Geometry Applications Unit Review

Describe how the circumference and the

diameter of a circle are related.

• The ratio of the circumference to the radius is approximately 3.14 or π

• The ratio of the diameter to π (3.14) is the circumference

• The ratio of the circumference to the diameter is approximately 3.14 or π

• They aren't related, they're just good friends :)

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7.5.B

7.8.B

A button has a diameter of 4 centimeters. What is the

area of the button?

Area = ___cm²

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7.9.B

Determine the area of the figure.

area = ____ cm²

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7.9.C

Write an equation for the area of the circle given the following conditions:

d = 15

• A = (2)(3.14)(15)

• A = 3.14(15²)

• A = (2)(3.14)(7.5)

• A = 3.14(7.5²)

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7.5.B

7.8.B

A baby monitor picks up signals within a 50-meter radius.

How many square meters of coverage does the baby monitor provide?

area = ____ m²

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7.9.B

The diagram shows a tile border (shown in gray) that surrounds a kiddie pool.

How many square feet does the tile border cover?

area = ___ ft²

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7.9.C

Write an equation for the area of the circle given the following conditions:

r = 5.5

• A = 3.14(5.5²)

• A = (2)(3.14)(5.5)

• A = 3.14(11²)

• A = (2)(3.14)(11)

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7.5.B

7.8.C

The area of the circle is 28.26 ft². What is the diameter?

d = ___ ft

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7.9.B

A square playground is covered with pebbles, except for two equal sized triangular portions that have grass. How many square

feet do the pebbles cover?

area = ____ ft²

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7.9.C

The circle in the center of a basketball court is being painted. The circle has a

radius of 9 feet. What is the circumference of the circle? Leave your solution in terms of pi.

Circumference = ___π

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7.9.B