Question

The diameter of a circle is 5 ft. Find its area in terms of pi

Answer 1

Answer: The area of the circle is 19.625

Explanation:

The formula for area of a circle is

`A = \pi r^2`

We know that the diameter is 5 ft. The radius is half of the diameter, so we take 1/2 * 5 = 2.5

So the radius is 2.5

Now we will fill in the numbers for the formula

`A = 3.14 * (2.5)^2`

or (3.14)(2.5)(2.5)

When we multiply all of the numbers, the area of the circle is 19.625

Answer 2

`6.25\pi \: {ft}^(2)`

Explanation:

Given:

d = 5 ft

Find: a (area) - ?

First, we have to find the radius (r) of the circle, which is half diameter:

r = 0,5 × d

r = 0,5 × 5 = 2,5 ft

Now we can find the area of the circle (a):

`a = \pi * {r}^(2) = \pi * ( {2.5})^(2) = 6.25\pi \: {ft}^(2)`