Question

Please help me, and explain how to solve it aswell.

Answer 1

A

Explanation:

The formula for circumfrence is C=pi x 2r or C= pi x r

In this case its C= 3.14 x 9 which is 28.26 rounded to 28.3

Answer 2

Answer A is correct.

Explanation:

Formula to find the circumference of a circle is :

C = π × d

Here,

d ⇒ diameter ⇒ 9m

First, let us find the circumference in terms of π.

C = π × d

= π × 9

= (9π)m

And now let us find the circumference to the nearest 10th.

Given that,

π = 3.14

Let us find now.

C = 9π m

= 9 × 3.14 m

= 28.26 m

≈ 28.3m