Question

I need help on this question ( Please show all work and explain clearly )

Answer 1

C

Explanation:

The equation of the area of a circle is
`\pi r^(2)`.

We already know the diameter is 8, and the radius is half of the diameter, so it would be 4.

`\pi 4^(2)`. This is our equation now. Now, we need to square 4, and 4x4 is 16.

Since 16
`\pi` and
`\pi`16 are the same, C is the correct answer.

Answer 2

C

Explanation:

The area (A) of a circle is calculated as

A = πr² ( where r is the radius )

Here diameter = 8 cm , thus r = 8 ÷ 2 = 4 cm , thus

A = π × 4² = 16π cm² → C