Question

I need help with this question pls

Answer 1

a) D

b) 4.09 cm

Explanation:

a) P of a circle is 22/7 D

Half a circle 1/2 22/7 D

D= 2r

1/2 22/7 2x (D)

b) Find Radius

P = (3.142 * (2r) )

25.71 = 3.142 *2r

r= 4.09 cm

Answer 2

A. would be a.

Explanation: