Question

What is the area of a circle with 5cm radius​

Answer 1

Explanation:

The formula to calculate the area of a circle is

`A =\pi r^2`

This means that if
`r = 5`, the area is

`A = 5^2\pi`

Answer 2

See below

Explanation:

We are given that a circle has a radius of 5 cm

We want to find the area of this circle

The area of a circle is given as
`\pi r^(2)`, where r is the radius

As stated above, the radius of this circle is 5; ergo, r =5

We can substitute 5 as r in the formula

A =
`\pi r^(2)`

A =
`\pi (5)^(2)`

Raise 5 to the 2nd power

A = π * 25

A = 25π cm²

If you need your answer in terms of pi (or as an exact answer), the answer would be 25π cm² (don't forget your units!)

However, if your system wants pi approximated, see below:

If your system wants pi to be used as 3.14, then multiply 25 by 3.14; 25 * 3.14 = 78.5 cm²

If your system wants pi to be used as 22/7, then multiply 25 by 22/7; 25 * 22/7 ≈ 78.57 cm²