Question

The radius of a circle is 7 cm.the circle is divided into two equal parts.what is the perimeter of each semicircle part

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Answer 1

≈ 22 cm

Explanation:

the circumference (C) of a circle ( the perimeter ) is calculated as

C = 2πr ( r is the radius )

= 2π × 7 = 14π

since divided into 2 equal parts then

`(1)/(2)` C = 14π ÷ 2 = 7π ≈ 22 cm ( to the nearest whole number )