Question

What is the approximate length of a semicircle with a radius of 12 centimeters?

A.
18.8 centimeters

B.
37.7 centimeters

C.
75.4 centimeters

D.
150.7 centimeters

Answer 1

\[C = 2 \pi r\]
for a semi circle it will be
\[C = \pi r\](since it;s a half of a full circle )
r is the radius
so...
\[C = 3.14 \times 12\]\[C = 37.68 \ cm \]
which is
37.7 cm

hope this will help ya:)

Answer 2

thanks