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Maths-

General

Easy

Question

Find the perimeter and area of a semicircle whose radius is 14 cm.

hint Hint:

Area and Perimeter of a semi – circle is half of the circle.

The correct answer is: 308 cm2

It is given that radius = 14 cm
Perimeter of semi – circle = $fraction numerator text perimeter of circle end text over denominator 2 end fraction equals fraction numerator 2 pi straight r over denominator 2 end fraction$
= $straight pi$ r = $22 over 7$ ×14
= 44 cm
Area of semi – circle = $fraction numerator text area of circle end text over denominator 2 end fraction$ = $fraction numerator pi r squared over denominator 2 end fraction$
= $1 half$ × $22 over 7$ × 14²
= 308 cm²

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