Congruent circles

Equal circles are circles with same radius is a concepts that is introduced in this activity.

Objectives

 * 1) The students learn that congruent circles are the circles that have same radius but different centres.
 * 2) Congruent circles can also be called as equal circles.

Estimated Time
3 minutes for video and 30 minutes to actually cut.

Prerequisites/Instructions, prior preparations, if any
The students should know what are congruent circles.

Materials/ Resources needed

 * 1) DIgital: Laptop, video link.
 * 2) Non digital: Cardboard, a stick, nails, scale, pencil.
 * 3) Video :

Process (How to do the activity)

 * 1) Ask the students to watch the youtube clip
 * 2) Was the compass used here?
 * 3) What types of circles did he cut?
 * 4) What type of stick can be used ? (straight)
 * 5) How many nails are fixed to the stick and for what purpose ?
 * 6) What does the fixed nail depict ?
 * 7) What is the trace made by moving line called ?
 * Evaluation
 * 1) Were the students able to conclude that there are alternatives for compass?
 * 2) Can you suggest some more methods of getting a circle?


 * 1) Find out which methods are used while drawing circles in rangoli designs ?