Question

Circumference of semi-circle is 36 find the diameter

Answer 1

$\frac{2\pi r}{2} = 36 \\ \pi r = 36 \\ r = \frac{36 \times 7}{22} = \frac{252}{22} \\ \\ \\ \\ diameter = 2r = \frac{2 \times 252}{22} = \frac{252}{11} cm \\ 22.909 \: cm$

Answer 2

Answer:

Step-by-step explanation:

Perimeter of protractor= perimeter of semicircle

2r+πr =36

r(2 + 22/7) =36

r= 7cm

D=2r

D= 2*7

D=14cm