Question

Find the area of a circle with a radius of 3

Answer 1

Answer:
`Area = 9\pi units^(2)`

Step-by-step explanation: To find the area of a circle with a radius of 3 units, start with the formula for the area of a circle.

`Area = \pi r^(2)`

In this problem, we are given the radius of the circle which is 3 units so we can plug a 3 into our formula.

`Area = (\pi) (3units)^(2)`

Remember that 3² is equal to 3 units x 3 units or 9 units².

`Area = 9\pi units^(2)`

The reason we square the units is for us to remember that we are dealing with area and not a 1 dimensional or 3 dimensional figure.

Answer 2

A = pi•r^2
A = 3.14....•3^2
A = 3.14....•9
A = 28.27433..... (9pi)