Glencoe Math: Course 2, Volume 2
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Glencoe Math: Course 2, Volume 2 View details
2. Area of Circles
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Exercise 26 Page 629

The area of a circle equals the product of π and the square of its radius.

About 1.2in.^2

Practice makes perfect

We are told that the Girl Scout patch has the shape of a circle with a diameter of 1.25 inches.

Circle
We want to find of the area of the patch. Recall that the area A of a circle equals the product of π and the square of its radius r. A = π r^2 Since the diameter of the circle is 1.25 inches, the radius of the circle is ( 12* 1.25) inches or 0.625 inch. Let's calculate the area using this information. We can use 3.14 for π.
A = π r^2
A = π ( 0.625^2)

π ≈ 3.14

A ≈ 3.14 (0.625^2)
A ≈ 3.14 (0.390625)
A ≈ 1.2265625
A ≈ 1.2
We found that A ≈ 1.2, which means that the area of the patch is about 1.2 square inches.