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Glencoe Math: Course 3, Volume 2 View details

1. Volume of Cylinders

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Exercise 23 Page 596

Recall the formula for finding the area of a circle.

Approximately 28.3 in.^2

Practice makes perfect

We are given a circle and want to find its area.

The area of a circle with radius r is calculated using the formula below. A=π r^2 From the figure we know that the radius of the circle is 3inches. By substituting 3 for r in the formula, we can calculate A.

A=π r^2

Substitute

r= 3

A=π( 3)^2

CalcPow

Calculate power

A=π(9)

UseCalc

Use a calculator

A=28.274334...

RoundDec

Round to 1 decimal place(s)