Question

if perimeter of a semicircle is 36cm find its of radius​

Answer 1

Answer:

7cm

Step-by-step explanation:

Let r be the radius of the protractor, then

Perimeter = πr + 2r

According to the question,

36 = πr + 2r

⇒  36 = r(22/7 + 2)

⇒   r = 7 cm.

Answer 2

diameter = 7 × 2 = 14

radius = 7