Question

The diameter of a circle is 8 cm. Find its area to the nearest whole number.

Answer 1

≈ 50 cm²

Explanation:

Use the equation
`A= (1)/(4) \pi d^(2)` Where d is the diameter.

Answer 2

The answer that you're looking for is approximately 50 (rounded), In terms of π, it is 16π.

Explanation:

In order to find the area you need to use the formula: Area =
`\pi r^(2)`.

Since The Diameter is double the amount of the radius you need to make sure to divide the diameter by 2 and replace "r" in the equation with the equation given.

8/2 gives you 4. Now you have the equation Area of Circle =
`\pi 4^(2)`.

Following the rules of PEMDAS we do exponents since there is no parenthesis.


`4^(2)` is the same as 16. In terms of pi, you just put pi next to your result giving 16π.

However, if you want to find out normally you can multiply with either 3.14 or π.

Both cases will give you different decimals, but when rounded to the nearest whole number they all give you 50.

Area of Circle =
`\pi r^(2)`.
Area of Circle =
`\pi 4^(2)`
Area of Circle = 16π
Area of Circle = 50 (rounded).

I hope this was helpful!