Sector of a circle

Objectives

1. Slice of a circle enclosed between any two radii is called a sector.
2. Semicircle and quadrant are special types of sectors.

Estimated Time

• 15 minutes

Prerequisites/Instructions, prior preparations, if any

• The students should know a circle, centre, radius,circumference and a sector.
• They should know that circle is a planar figure.

Materials/ Resources needed

Laptop, geogebra file, projector and a pointer.

Show the geogebra file.

Process (How to do the activity)

1. Move the endpoints of the sector and help them understand the types of sector.

1. Name all the points on the circumference.
2. Name the endpoints of the sector.
3. Name the major and minor sectors.
4. What can you say about the two straight lines of the sector?

• Evaluation

1. Name the special types of sector?

1. Give some examples of sector.