Semicircle

Partitioning a circle into two halves to form semicircles by drawing diameter.

Objectives

 * 1) A diameter divides the circle into two equal halves and each such half is a semicircle or hemicircle.
 * 2) Forming a semicircle by joining any two points on the circumference through its centre i.e. by drawing a diameter.

Estimated Time
10 minutes

Prerequisites/Instructions, prior preparations, if any
Circle and diameter should have been introduced.

Ask children the previous day to cut circles of given radius and bring.

Materials/ Resources needed
Non digital: White paper, compass and colour pencils

Process (How to do the activity)

 * 1) Bring cut circles of different sizes.
 * 2) Fold them into exact halves.
 * 3) Recognise semicircles. Let them colour each half with different colour.
 * 4) Identify the centre, circumference, diameter and semicircle of the circle.
 * 5) Fold circle into exact half.
 * 6) Draw diameter on folded line and colour each half with different colour.
 * Evaluation
 * 1) Were the students able to draw and cut perfect circles?
 * 2) Was the folded line (diameter) passing through the center of circle?
 * 3) In how many different ways can you draw semicircles for a given circle?