Page 213 - New Medley 4 Semester 1

MATHS LAB ACTIVITY • Experiential Learning

Aim: To determine the centre and the radius of a circle

Materials: A paper plate, a pair of scissors, a marker/pencil and a ruler

Method:

1. Take a paper plate and find the outline of a circle made on

it.
2. Using a pair of scissors, cut the outer part of this plate

out with the help of your teacher or an elder.

3. Then, take the cut-out and fold into halves as shown below.
Again, fold it into quarters.

→ →

Folded into Folded into
halves quarters

4. Unfold the cut-out and mark the point where two
C Centre
creases cross each other as the centre. Name the

centre as O and other four segments OA, OB, OC
and OD as radii. A O B

5. Measure the line segments OA, OB, OC and OD. Are
these line segments equal? D

Observation:

1. OA = OB = OC = OD = cm

2. OA = AB or AB = OA

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