Question

If the diameter of the circle is 4 mm, what is the area of the circle?

Answer 1

area = PI x r^2

radius is half the diameter 4/2 = 2

PI = 3.14

area = 3.14 x 2^2

area = 12.56 mm^2

Answer 2

Hello!

We must use the formula for area of a circle to solve this question:

FORMULA:

'd' stands for diameter and 3.14 is pi.

A = 3.14 × d

SUBSTITUTE:

A = 3.14 × 4

A = 12.56 mm sq

A N S W E R:

The area of the circle is 12.56 mm squared. (Make sure to write a 2 above the mm because are is always SQUARED!)