Sector of a circle

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

Objectives

 * To understand area enclosed by two radii is sector.

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
Non digital: Laptop, geogebra file, projector and a pointer.

Geogebra file: Arcs and Sector of a circle

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?
 * 2) Give some examples of sector.