body{margin:0;} noscript{z-index: 10000; position: fixed; display: block; height: 100%; width: 100%; background: #fff;} noscript .fa{font-size: 40px; display:block; color: #daa520;} noscript div{margin-top: 6%; padding-left: 20px; padding-right: 20px; text-align: center;} ! You must have JavaScript enabled to use this site.

Dashboard

GM

Glencoe Math: Course 3, Volume 2 View details

1. Volume of Cylinders

Finish the assignment

Continue to next subchapter

Exercise 21 Page 596

Recall the formula for finding the area of a circle.

About 201.1 cm^2

Practice makes perfect

We are given a circle and we 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 8cm. By substituting 8 for r in the formula, we can calculate A.

A=π r^2

Substitute

r= 8

A=π( 8)^2

CalcPow

Calculate power

A=π(64)

UseCalc

Use a calculator

A=201.061930...

RoundDec

Round to 1 decimal place(s)