MEASUREMENTS

AREA OF A PENTAGON

By the end of the lesson, the learner should be able to:
;
-Identify and state number of sides in a pentagon.
-Work out area of a pentagon.
-Solve more problems involving area of pentagon.
-Develop genuine interest in calculating the area of pentagon.

In groups and individually, learners are guided to;
-Identify and recognizing the number of sides in a pentagon.
-Naming different objects with pentagonal shapes.
-Working the area of different pentagons using formula.
-Work out more problems on area of pentagons.
-Make paper cut outs of pentagons and relating them with real day to day objects.

-How many sides does a pentagon have?

-Mentors Mathematics learners book grade 9 page 73-74.
-Paper cut outs.
-Charts with different pentagons with different measurements.
-Pair of scissors.
-Manilla paper.
-A ruler and a pair of protractor.

-Checklist -Written exercise. -Oral question. -Assessment rubrics.

MEASUREMENTS

AREA OF A PENTAGON

By the end of the lesson, the learner should be able to:
;
-Identify and state number of sides in a pentagon.
-Work out area of a pentagon.
-Solve more problems involving area of pentagon.
-Develop genuine interest in calculating the area of pentagon.

In groups and individually, learners are guided to;
-Identify and recognizing the number of sides in a pentagon.
-Naming different objects with pentagonal shapes.
-Working the area of different pentagons using formula.
-Work out more problems on area of pentagons.
-Make paper cut outs of pentagons and relating them with real day to day objects.

-How many sides does a pentagon have?

-Mentors Mathematics learners book grade 9 page 73-74.
-Paper cut outs.
-Charts with different pentagons with different measurements.
-Pair of scissors.
-Manilla paper.
-A ruler and a pair of protractor.

-Checklist -Written exercise. -Oral question. -Assessment rubrics.

MEASUREMENTS

AREA OF A PENTAGON

By the end of the lesson, the learner should be able to:
;
-Identify and state number of sides in a pentagon.
-Work out area of a pentagon.
-Solve more problems involving area of pentagon.
-Develop genuine interest in calculating the area of pentagon.

In groups and individually, learners are guided to;
-Identify and recognizing the number of sides in a pentagon.
-Naming different objects with pentagonal shapes.
-Working the area of different pentagons using formula.
-Work out more problems on area of pentagons.
-Make paper cut outs of pentagons and relating them with real day to day objects.

-How many sides does a pentagon have?

-Mentors Mathematics learners book grade 9 page 73-74.
-Paper cut outs.
-Charts with different pentagons with different measurements.
-Pair of scissors.
-Manilla paper.
-A ruler and a pair of protractor.

-Checklist -Written exercise. -Oral question. -Assessment rubrics.

MEASUREMENTS

AREA OF A PENTAGON

By the end of the lesson, the learner should be able to:
;
-Identify and state number of sides in a pentagon.
-Work out area of a pentagon.
-Solve more problems involving area of pentagon.
-Develop genuine interest in calculating the area of pentagon.

In groups and individually, learners are guided to;
-Identify and recognizing the number of sides in a pentagon.
-Naming different objects with pentagonal shapes.
-Working the area of different pentagons using formula.
-Work out more problems on area of pentagons.
-Make paper cut outs of pentagons and relating them with real day to day objects.

-How many sides does a pentagon have?

-Mentors Mathematics learners book grade 9 page 73-74.
-Paper cut outs.
-Charts with different pentagons with different measurements.
-Pair of scissors.
-Manilla paper.
-A ruler and a pair of protractor.

-Checklist -Written exercise. -Oral question. -Assessment rubrics.

MEASUREMENTS

AREA OF A HEXAGON

By the end of the lesson, the learner should be able to:

-Identify and state number of sides in a Haxagon.
-Discuss the properties of a hexagon.
-Use triangles to work out area of a hexagon.
-Solve more problems involving area of hexagon.
-Develop genuine interest in calculating the area of Hexagon.

In groups and individually, learners are guided to;
-Identify and recognizing the number of sides in a hexagon.
-Naming different objects with hexagonal shapes.
-Working the area of different Hexagons using formula (summing up areas of various triangles).
-Work out more problems on area of hexagons.
-Make paper cut outs of hexagons and display them in class relating them with real day to day objects.

-How many sides do a Hexagon have? -Which objects have Hexagonal shape?

-Mentors Mathematics learners book grade 9 page 74-76.
-Paper cut outs.
-Charts with different pentagons with different measurements.
-Pair of scissors.
-Manilla paper.
-A ruler and a pair of protractor.

-Checklist -Written exercise. -Oral question. -Assessment rubrics.

MEASUREMENTS

SURFACE AREA OF A RECTANGULAR PRISM

By the end of the lesson, the learner should be able to:
-Draw a rectangular prism.
-Work out the surface area of a rectangular prism.
-Work out more problems on surface area of rectangular prism.

In pairs, Learners are guided to;
-Listing objects which are rectangular prism in shape.
-Working out the surface area of a rectangular prism.
-Work on more problems on the surface area of a rectangular prism.
-Making various models of rectangular prism.

-How many faces,edges and vertices do a rectangular prism have?

-Mentors Mathematics learners book grade 9 page 77-78.
-Boxes
-Pair of scissors.
-Manilla paper.
-Glue
-Plain papers.
-Ruler.

-Checklist -Written exercise. -Oral question. -Assessment rubrics.

MEASUREMENTS

SURFACE AREA OF A RECTANGULAR PRISM

By the end of the lesson, the learner should be able to:
-Draw a rectangular prism.
-Work out the surface area of a rectangular prism.
-Work out more problems on surface area of rectangular prism.

In pairs, Learners are guided to;
-Listing objects which are rectangular prism in shape.
-Working out the surface area of a rectangular prism.
-Work on more problems on the surface area of a rectangular prism.
-Making various models of rectangular prism.

-How many faces,edges and vertices do a rectangular prism have?

-Mentors Mathematics learners book grade 9 page 77-78.
-Boxes
-Pair of scissors.
-Manilla paper.
-Glue
-Plain papers.
-Ruler.

-Checklist -Written exercise. -Oral question. -Assessment rubrics.

MEASUREMENTS

SURFACE AREA OF A RECTANGULAR PRISM

By the end of the lesson, the learner should be able to:
-Draw a rectangular prism.
-Work out the surface area of a rectangular prism.
-Work out more problems on surface area of rectangular prism.

In pairs, Learners are guided to;
-Listing objects which are rectangular prism in shape.
-Working out the surface area of a rectangular prism.
-Work on more problems on the surface area of a rectangular prism.
-Making various models of rectangular prism.

-How many faces,edges and vertices do a rectangular prism have?

-Mentors Mathematics learners book grade 9 page 77-78.
-Boxes
-Pair of scissors.
-Manilla paper.
-Glue
-Plain papers.
-Ruler.

-Checklist -Written exercise. -Oral question. -Assessment rubrics.

MEASUREMENTS

SURFACE AREA OF TRIANGULAR BASED PRISM

By the end of the lesson, the learner should be able to:
- Draw a triangular prism.
Work out the surface area of a triangular prism.
- Work out more problems on surface area of triangular prism.
-Make various models of triangular prism.
-Show genuine interest in calculating the surface area of triangular prism.

In groups or pairs, learners are guided to;
-Recognizing various objects from their surrounding which are triangular prism in shape.
-Stating the number of faces,edges and vertices in a triangular prism.
-Work out the surface area of a triangular prism.
-Working more problems on calculating the surface area of a triangular prism.
-Mounting the constructed models on triangular prism in class.

-How many faces,edges and vertices do a triangular prism have? -Which objects have triangular prism shape?

-Mentors Mathematics learners book grade 9 page 78-80.
-Boxes
-Pair of scissors.
-Manilla paper.
-Glue
-Plain papers.
-Ruler.

-Checklist -Written exercise. -Oral question. -Assessment rubrics.

MEASUREMENTS

SURFACE AREA OF TRIANGULAR BASED PRISM

By the end of the lesson, the learner should be able to:
- Draw a triangular prism.
Work out the surface area of a triangular prism.
- Work out more problems on surface area of triangular prism.
-Make various models of triangular prism.
-Show genuine interest in calculating the surface area of triangular prism.

In groups or pairs, learners are guided to;
-Recognizing various objects from their surrounding which are triangular prism in shape.
-Stating the number of faces,edges and vertices in a triangular prism.
-Work out the surface area of a triangular prism.
-Working more problems on calculating the surface area of a triangular prism.
-Mounting the constructed models on triangular prism in class.

-How many faces,edges and vertices do a triangular prism have? -Which objects have triangular prism shape?

-Mentors Mathematics learners book grade 9 page 78-80.
-Boxes
-Pair of scissors.
-Manilla paper.
-Glue
-Plain papers.
-Ruler.

-Checklist -Written exercise. -Oral question. -Assessment rubrics.

MEASUREMENTS

SURFACE AREA OF PYRAMID

By the end of the lesson, the learner should be able to:
-Draw a triangular based pyramid.
-Discuss the number faces,edges and vertices in a triangular based pyramid.
-Use locally available materials to model triangular based pyramid and display them in class for peer assessment.
-Work out the surface area of triangular based pyramid.
-Show genuine interest in calculating surface area of triangular based pyramid.

In groups or pairs, learners are guided to;
-Draw and listing the number of faces,edges and vertices in a triangular based pyramid.
-Model triangular based pyramid using locally available materials.
-Work out the surface area of triangular based pyramid.
-Solve more problems on surface area of triangular based prism.

-How many faces,vertices and edges does a triangular based pyramid have? -Which objects are triangular based pyramid in shape?

-Mentors Mathematics learners book grade 9 page 81-82.
-Boxes
-Pair of scissors.
-Manilla paper.
-Glue
-Plain papers.
-Ruler.

-Checklist -Written exercise. -Oral question. -Assessment rubrics.

MEASUREMENTS

Surface area of a rectangular based pyramid.

By the end of the lesson, the learner should be able to:
-Draw a rectangular based pyramid.
-Discuss the number of faces,vertices and edges.
-Use locally available materials to model a rectangular based pyramid.
-Calculate the surface area of rectangular based pyramid.
-Show genuine interest in calculating surface area of rectangular based pyramid.

In groups and individually, learners are guided to;
-Draw and find out number of faces,vertices and edges in a rectangular based pyramid.
-Model rectangular based pyramid using locally available materials.
-Calculate the surface area of a rectangular based pyramid.
-Work out more problems on surface area of rectangular based pyramid.

-How many faces,vertices and edges does a rectangular based pyramid have? -Which objects are rectangular based pyramid in shape?

-Mentors Mathematics learners book grade 9 page 82-83.
-Boxes
-Pair of scissors.
-Manilla paper.
-Glue
-Plain papers.
-Ruler.

-Checklist -Written exercise. -Oral question. -Assessment rubrics.

MEASUREMENTS

Surface area of a rectangular based pyramid.

By the end of the lesson, the learner should be able to:
-Draw a rectangular based pyramid.
-Discuss the number of faces,vertices and edges.
-Use locally available materials to model a rectangular based pyramid.
-Calculate the surface area of rectangular based pyramid.
-Show genuine interest in calculating surface area of rectangular based pyramid.

In groups and individually, learners are guided to;
-Draw and find out number of faces,vertices and edges in a rectangular based pyramid.
-Model rectangular based pyramid using locally available materials.
-Calculate the surface area of a rectangular based pyramid.
-Work out more problems on surface area of rectangular based pyramid.

-How many faces,vertices and edges does a rectangular based pyramid have? -Which objects are rectangular based pyramid in shape?

-Mentors Mathematics learners book grade 9 page 82-83.
-Boxes
-Pair of scissors.
-Manilla paper.
-Glue
-Plain papers.
-Ruler.

-Checklist -Written exercise. -Oral question. -Assessment rubrics.

MEASUREMENTS

Surface area of a rectangular based pyramid.

By the end of the lesson, the learner should be able to:
-Draw a rectangular based pyramid.
-Discuss the number of faces,vertices and edges.
-Use locally available materials to model a rectangular based pyramid.
-Calculate the surface area of rectangular based pyramid.
-Show genuine interest in calculating surface area of rectangular based pyramid.

In groups and individually, learners are guided to;
-Draw and find out number of faces,vertices and edges in a rectangular based pyramid.
-Model rectangular based pyramid using locally available materials.
-Calculate the surface area of a rectangular based pyramid.
-Work out more problems on surface area of rectangular based pyramid.

-How many faces,vertices and edges does a rectangular based pyramid have? -Which objects are rectangular based pyramid in shape?

-Mentors Mathematics learners book grade 9 page 82-83.
-Boxes
-Pair of scissors.
-Manilla paper.
-Glue
-Plain papers.
-Ruler.

-Checklist -Written exercise. -Oral question. -Assessment rubrics.

MEASUREMENTS

Surface area of a rectangular based pyramid.

By the end of the lesson, the learner should be able to:
-Draw a rectangular based pyramid.
-Discuss the number of faces,vertices and edges.
-Use locally available materials to model a rectangular based pyramid.
-Calculate the surface area of rectangular based pyramid.
-Show genuine interest in calculating surface area of rectangular based pyramid.

In groups and individually, learners are guided to;
-Draw and find out number of faces,vertices and edges in a rectangular based pyramid.
-Model rectangular based pyramid using locally available materials.
-Calculate the surface area of a rectangular based pyramid.
-Work out more problems on surface area of rectangular based pyramid.

-How many faces,vertices and edges does a rectangular based pyramid have? -Which objects are rectangular based pyramid in shape?

-Mentors Mathematics learners book grade 9 page 82-83.
-Boxes
-Pair of scissors.
-Manilla paper.
-Glue
-Plain papers.
-Ruler.

-Checklist -Written exercise. -Oral question. -Assessment rubrics.

MEASUREMENTS

Surface area of a square based pyramid.

By the end of the lesson, the learner should be able to:
-Draw a square based pyramid.
-Discuss the number of faces,vertices and edges.
-Use locally available materials to model a square based pyramid.
-Calculate the surface area of square based pyramid.
-Show genuine interest in calculating surface area of a square based pyramid.

In groups and individually, learners are guided to;
-Draw and find out number of faces,vertices and edges in a square based pyramid.
-Model square based pyramid using locally available materials.
-Calculate the surface area of a square based pyramid.
-Work out more problems on surface area of square based pyramid.

-How many faces,vertices and edges does a square based pyramid have? -Which objects are square based pyramid in shape?

-Mentors Mathematics learners book grade 9 page 83-84.
-Boxes
-Pair of scissors.
-Manilla paper.
-Glue
-Plain papers.
-Ruler.

-Checklist -Written exercise. -Oral question. -Assessment rubrics.

MEASUREMENTS

Surface area of a square based pyramid.

By the end of the lesson, the learner should be able to:
-Draw a square based pyramid.
-Discuss the number of faces,vertices and edges.
-Use locally available materials to model a square based pyramid.
-Calculate the surface area of square based pyramid.
-Show genuine interest in calculating surface area of a square based pyramid.

In groups and individually, learners are guided to;
-Draw and find out number of faces,vertices and edges in a square based pyramid.
-Model square based pyramid using locally available materials.
-Calculate the surface area of a square based pyramid.
-Work out more problems on surface area of square based pyramid.

-How many faces,vertices and edges does a square based pyramid have? -Which objects are square based pyramid in shape?

-Mentors Mathematics learners book grade 9 page 83-84.
-Boxes
-Pair of scissors.
-Manilla paper.
-Glue
-Plain papers.
-Ruler.

-Checklist -Written exercise. -Oral question. -Assessment rubrics.

MEASUREMENTS

Surface area of a square based pyramid.

By the end of the lesson, the learner should be able to:
-Draw a square based pyramid.
-Discuss the number of faces,vertices and edges.
-Use locally available materials to model a square based pyramid.
-Calculate the surface area of square based pyramid.
-Show genuine interest in calculating surface area of a square based pyramid.

In groups and individually, learners are guided to;
-Draw and find out number of faces,vertices and edges in a square based pyramid.
-Model square based pyramid using locally available materials.
-Calculate the surface area of a square based pyramid.
-Work out more problems on surface area of square based pyramid.

-How many faces,vertices and edges does a square based pyramid have? -Which objects are square based pyramid in shape?

-Mentors Mathematics learners book grade 9 page 83-84.
-Boxes
-Pair of scissors.
-Manilla paper.
-Glue
-Plain papers.
-Ruler.

-Checklist -Written exercise. -Oral question. -Assessment rubrics.

MEASUREMENTS

Surface area of a square based pyramid.

By the end of the lesson, the learner should be able to:
-Draw a square based pyramid.
-Discuss the number of faces,vertices and edges.
-Use locally available materials to model a square based pyramid.
-Calculate the surface area of square based pyramid.
-Show genuine interest in calculating surface area of a square based pyramid.

In groups and individually, learners are guided to;
-Draw and find out number of faces,vertices and edges in a square based pyramid.
-Model square based pyramid using locally available materials.
-Calculate the surface area of a square based pyramid.
-Work out more problems on surface area of square based pyramid.

-How many faces,vertices and edges does a square based pyramid have? -Which objects are square based pyramid in shape?

-Mentors Mathematics learners book grade 9 page 83-84.
-Boxes
-Pair of scissors.
-Manilla paper.
-Glue
-Plain papers.
-Ruler.

-Checklist -Written exercise. -Oral question. -Assessment rubrics.

MEASUREMENTS

Surface area of a square based pyramid.

By the end of the lesson, the learner should be able to:
-Draw a square based pyramid.
-Discuss the number of faces,vertices and edges.
-Use locally available materials to model a square based pyramid.
-Calculate the surface area of square based pyramid.
-Show genuine interest in calculating surface area of a square based pyramid.

In groups and individually, learners are guided to;
-Draw and find out number of faces,vertices and edges in a square based pyramid.
-Model square based pyramid using locally available materials.
-Calculate the surface area of a square based pyramid.
-Work out more problems on surface area of square based pyramid.

-How many faces,vertices and edges does a square based pyramid have? -Which objects are square based pyramid in shape?

-Mentors Mathematics learners book grade 9 page 83-84.
-Boxes
-Pair of scissors.
-Manilla paper.
-Glue
-Plain papers.
-Ruler.

-Checklist -Written exercise. -Oral question. -Assessment rubrics.

MEAREMENTS

Area of a circle

By the end of the lesson, the learner should be able to:
-Define a circle.
-Work out area of a circle using the formula A = π r².
-Show genuine interest in calculating the area of a circle.

In groups or pairs, learners are guided to;
-Define a circle.
-Relate the relationship between diameter and radius of a circle.
-Calculate the area of different circles.
-Work out more problems on area of a circle using the learnt formula.

-Mentors Mathematics learners book grade 9 page 86.
-Pair of scissors.
-Manilla paper.
-Glue
-Plain papers.
-Circular objects.
-A pair of compass.

-Checklist -Written exercise. -Oral question. -Assessment rubrics.

MEAREMENTS

Area of a circle

By the end of the lesson, the learner should be able to:
-Define a circle.
-Work out area of a circle using the formula A = π r².
-Show genuine interest in calculating the area of a circle.

In groups or pairs, learners are guided to;
-Define a circle.
-Relate the relationship between diameter and radius of a circle.
-Calculate the area of different circles.
-Work out more problems on area of a circle using the learnt formula.

-Mentors Mathematics learners book grade 9 page 86.
-Pair of scissors.
-Manilla paper.
-Glue
-Plain papers.
-Circular objects.
-A pair of compass.

-Checklist -Written exercise. -Oral question. -Assessment rubrics.

MEAREMENTS

Area of a circle

By the end of the lesson, the learner should be able to:
-Define a circle.
-Work out area of a circle using the formula A = π r².
-Show genuine interest in calculating the area of a circle.

In groups or pairs, learners are guided to;
-Define a circle.
-Relate the relationship between diameter and radius of a circle.
-Calculate the area of different circles.
-Work out more problems on area of a circle using the learnt formula.

-Mentors Mathematics learners book grade 9 page 86.
-Pair of scissors.
-Manilla paper.
-Glue
-Plain papers.
-Circular objects.
-A pair of compass.

-Checklist -Written exercise. -Oral question. -Assessment rubrics.

MEAREMENTS

Area of a circle

By the end of the lesson, the learner should be able to:
-Define a circle.
-Work out area of a circle using the formula A = π r².
-Show genuine interest in calculating the area of a circle.

In groups or pairs, learners are guided to;
-Define a circle.
-Relate the relationship between diameter and radius of a circle.
-Calculate the area of different circles.
-Work out more problems on area of a circle using the learnt formula.

-Mentors Mathematics learners book grade 9 page 86.
-Pair of scissors.
-Manilla paper.
-Glue
-Plain papers.
-Circular objects.
-A pair of compass.

-Checklist -Written exercise. -Oral question. -Assessment rubrics.

MEASUREMENTS

Area of a sector of a circle.

By the end of the lesson, the learner should be able to:
-Define the term sector of a circle.
-Demonstrate how to get sector of a circle from the main circle.
-Calculate the area of sector of a circle.

In groups or pairs, learners are guided to;
-Define the sector of a circle.
-Getting sector of a circle from the main circle.
-Applying the formula for calculating the area of sector of a circle (θ/360º) × πr2
-Working more problems on area of sector of a circle.

-What is a sector of a circle?

-Mentors Mathematics learners book grade 9 page 86.
-Pair of scissors.
-Manilla paper.
-Glue
-Paper cut outs.
-Circular objects.
-A pair of compass.

-Checklist -Written exercise. -Oral question. -Assessment rubrics.

MEASUREMENTS

Area of a segment of a circle.

By the end of the lesson, the learner should be able to:
-Define the term segment of a circle.
-Identify a segment in a circle.
-Work out the area of segment of a circle.
-Make paper cut outs on segments of a circle.

In groups or pairs, learners are guided to;
-Define the term segment of a circle.
-Identify and demonstrate how to get the segment of a circle.
-Work the area of segment of a circle.
-Make models on segments of a circle.

-What is a segment of a circle?

-Mentors Mathematics learners book grade 9 page 87.
-Pair of scissors.
-Manilla paper.
-Glue
-Paper cut outs.
-Circular objects.
-A pair of compass.

-Checklist -Written exercise. -Oral question.

MEASUREMENTS

Area of a segment of a circle.

By the end of the lesson, the learner should be able to:
-Define the term segment of a circle.
-Identify a segment in a circle.
-Work out the area of segment of a circle.
-Make paper cut outs on segments of a circle.

In groups or pairs, learners are guided to;
-Define the term segment of a circle.
-Identify and demonstrate how to get the segment of a circle.
-Work the area of segment of a circle.
-Make models on segments of a circle.

-What is a segment of a circle?

-Mentors Mathematics learners book grade 9 page 87.
-Pair of scissors.
-Manilla paper.
-Glue
-Paper cut outs.
-Circular objects.
-A pair of compass.

-Checklist -Written exercise. -Oral question.

MEASUREMENTS

Area of a segment of a circle.

By the end of the lesson, the learner should be able to:
-Define the term segment of a circle.
-Identify a segment in a circle.
-Work out the area of segment of a circle.
-Make paper cut outs on segments of a circle.

In groups or pairs, learners are guided to;
-Define the term segment of a circle.
-Identify and demonstrate how to get the segment of a circle.
-Work the area of segment of a circle.
-Make models on segments of a circle.

-What is a segment of a circle?

-Mentors Mathematics learners book grade 9 page 87.
-Pair of scissors.
-Manilla paper.
-Glue
-Paper cut outs.
-Circular objects.
-A pair of compass.

-Checklist -Written exercise. -Oral question.

MEASUREMENTS

Surface area of a cone.

By the end of the lesson, the learner should be able to:
-Draw a cone.
-Model a cone using locally available materials.
-Show genuine interest in modeling a cone.

In groups or pairs, learners are guided to;
-Identify and draw a cone in their books.
-Model a cone using locally available materials.
-Discuss with peers as they model cones.

-What is a cone ? -Which are some of items with conical shapes ?

-Mentors Mathematics learners book grade 9 page 91-92.
-Pair of scissors.
-Manilla paper.
-Glue
-Paper cut outs.
-Circular objects.
-A pair of compass.

-Checklist -Written exercise. -Oral question.

MEASUREMENTS

Surface area of a cone.

By the end of the lesson, the learner should be able to:
-Draw a cone.
-Model a cone using locally available materials.
-Show genuine interest in modeling a cone.

In groups or pairs, learners are guided to;
-Identify and draw a cone in their books.
-Model a cone using locally available materials.
-Discuss with peers as they model cones.

-What is a cone ? -Which are some of items with conical shapes ?

-Mentors Mathematics learners book grade 9 page 91-92.
-Pair of scissors.
-Manilla paper.
-Glue
-Paper cut outs.
-Circular objects.
-A pair of compass.

-Checklist -Written exercise. -Oral question.

MEASUREMENT

Surface area of a cone.

By the end of the lesson, the learner should be able to:
- Identify and apply the formula for calculating the surface area of a cone; A = πr² + πrl
-Work out the surface area of a cone.
-Appreciate working out the surface area of a cone.

In groups or pairs, learners are guided to;
-Demonstrate how to apply the formula for calculating the surface area of cones.
-Work out the surface area of cones.
-Work out more problems relating to surface area of cones.

-What is a cone ? -Which are some of items with conical shapes ?

-Mentors Mathematics learners book grade 9 page 92-93.
-A Calculator.
-Black board illustration.
-A chart on how to calculate the surface area of a cone.

-Checklist -Written exercise. -Oral question.