Question

find the perimeter of a semicircle the diameter of which is 20 CM.
$( \: hint \: = \: take \: \pi \: = \: 3.14)$

Answer 1

hey this is your answer

Perimeter of a circle = 2πr
diameter , d = 20 cm

Perimeter of a semi circle = 1/2 π × d + d.
= 1/2 × 3.14 × 20 +20
( π = 3.14 ) = 51 . 4 m

Answer 2

perimeter = 1/2*(3.14×20)+20
= 1/2*62.8+20
=31.4+20
=51.4

I HOPE IT WILL HELP YOU