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.

Big Ideas Math Geometry, 2014

BI

Big Ideas Math Geometry, 2014 View details

2. Areas of Circles and Sectors

Continue to next subchapter

Exercise 3 Page 606

Use the formula to find the area of a circle.

About 0.50 cm^2

Practice makes perfect

We are given a circle with a radius of 0.4 centimeters.

Our mission is to find the area of ⊙ C, for which we will use the following formula. A = π r^2 Thus, to find the area we substitute r=0.4 into the formula above.

A = π r^2

r= 0.4

A = π ( 0.4)^2

▼

Simplify

Calculate power

A = π (0.16)

Multiply

A ≈ 0.5

In consequence, the area of ⊙ C is approximately 0.50 cm^2.

Subchapter links

Communicate Your Answer p.601

Monitoring Progress p.602-605