Question

Find area of semi circle radius 7ch and 5ch

Answer 1

HEYA ✳✳✳✳✳

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area of semi circle = ( πr^2 ) / 2

on taking radius 7ch

( 22/ 7 × 7×7 ) / 2

= 77 ch^2

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on taking radius 5 ch

( 22/ 7 × 5 × 5 ) / 2

= 1100 / 7 = 157.1428 ch ^2

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THANKS ♥

Answer 2

Hey mate!

We know that,
Area of a circle = πr^2
Therefore,
Area of first semi-circle = (πr1^2)/2
=> [(22/7)×7×7]/2 [Since r1=7 cm]
=> 77 sq.cm.
Also,
Area of second semi-circle = πr2^2
=> [(22/7)×5×5]/2 [Since r2=5 cm]
=> 39.28 sq.cm.

That's the answer!

Hope it helps :)