Question

Find the area of a circle with a diameter of 16. Either enter an exact answer in terms of pi or use 3.14 and enter your answer as a decimal.

Answer 1

The area of a cicle is
`64\pi` square units

Area of a circle
`A=64\pi` square units in terms of
`\pi`

Explanation:

Given that the diameter of a circle is 16

That is d=16

Therefore radius
`r=(d)/(2)`

`r=(16)/(2)`

`=8`

Therefore radius r=8

Now to find the area of a circle :

Area of a circle
`A=\pi r^2` square units

Substitute r=8 we get

Area of a circle
`A=\pi 8^2`

`=64\pi`

Therefore the area of a cicle is
`64\pi`square units

Area of a circle
`A=64\pi`square units in terms of
`\pi`