Sector of a circle

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Learning objectives

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

Activity No # Different sectors of a circle

• Estimated Time : 15 minutes
• Materials/ Resources needed : Laptop, geogebra file, projector and a pointer.
• Prerequisites/Instructions, if any

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

• Multimedia resources
• Website interactives/ links/ / Geogebra Applets :

• Process:

1. Show the geogebra file.
2. Move the endpoints of the sector and help them understand the types of sector.

• Developmental Questions:

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?

• Question Corner

1. Give some examples of sector.