Question

Solve this step by step

Answer 1

Explanation:

the formula to calculate a circumference is

`x * \pi`

(consider x as the diameter)

so I'll be noting the circumference as C alongside the circle's ranking

a.

`ca = 6 * 22 / 7 \\ = 44 / 7`

b.

`cb = 7 * 22 / 7 \\ = 154 / 7 \\ = 22`

c.

`cc \: = 4 * 22 / 7 \\ = 88 / 7`

hope I helped