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

Answer 1

Answer:

≈ 22 cm

Step-by-step 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

$\frac{1}{2}$ C = 14π ÷ 2 = 7π ≈ 22 cm ( to the nearest whole number )