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1. Find the circumferences of the circles whose radii are :
(a) 21 cm
Answers
Answered by
1
Answer:
132cm
Step-by-step explanation:
Answered by
0
It is given that,
Radius of a circle = 21 cm.
We know that π=22/7,
So the circumference of a circle = 2πr
Substituting the values,
=2 x 22/7 x 21
So we get,
=2 x 22 x 3
=132 cm.
Radius of a circle = 21 cm.
We know that π=22/7,
So the circumference of a circle = 2πr
Substituting the values,
=2 x 22/7 x 21
So we get,
=2 x 22 x 3
=132 cm.
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