Question

find radius if circumference is 132 cm

Answer 1

Answer:

Circumference of circle = 132 cm.

So, the radius of circle is 21 cm.

Answer 2

Answer:

$c = 2\pi \: r \\ 132 = 2\pi \: r \\ \frac{132 \times 7}{2 \times 22} = r \\ 21 = r$

hope it's helpful!