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Maths-

General

Easy

Question

Find the perimeter of a semicircle of radius 28 cm.

hint Hint:

Perimeter of a semi – circle is half that of a circle.

The correct answer is: 88 cm

It is given that radius = 28 cm
Perimeter of semi – circle = $fraction numerator text perimeter of circle end text over denominator 2 end fraction equals fraction numerator 2 pi r over denominator 2 end fraction$
= $straight pi$ r = $22 over 7$ × 28
= 88 cm

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