Question

What is the area of a circle with a diameter of 16?

Answer 1

The formula to find the area of a circle is:


`a= \pi r^(2)`

Step 1:
We will be dividing the diameter by two to find the radius.

16 ÷ 2 = 8

Step 2:
We will find what 8 squared is.


`8^(2)`

8*8= 64


Step 3:
We will be inputting this number is our formula.


`A= \pi 64`


Step 4:
We still need to multiply
`64 * \pi` to find our area.


`64 * \pi` = 201.0619298297467673

Step 5:

We will round this to the nearest whole number.

Our rounded number is 201

Our answer:

`\boxed{a=201}` or
`\boxed{a=201.06}`