TEKS.MATH.7.9B

A DVD has a diameter of 15 millimeters. Which equation would help you determine the circumference?

• c = 15π
• C = 2π15
• c = 15/π
• c = 15/2π

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TEKS.MATH.7.9B

What is the circumference of a 12-inch pizza?

• 37.68 inches
• 18.84 inches
• 113.04 inches
• 432.16 inches

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TEKS.MATH.7.9B

What is the formula for the area of a circle?

• A=2πr
• A=2πd
• A=πr²
• A=2πr²

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TEKS.MATH.7.9B

what is the area of this semicircle ?
d = 8 cm 

• 100.48 cm²
• 80 cm²
• 200.96 cm²
• 25.12 cm²

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TEKS.MATH.7.9B

Calculate the area. Use 3.14 for pi. Round to the nearest tenth if needed.

• 124.3 m ²

• 258.4 m ²

• 435.1 m ²

• 302.5 m ²

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TEKS.MATH.7.9B

A cruise ship has a large, circular window. It has a diameter of 8 meters. What is the window's area?

• 31.25 m²

• 29.55 m²

• 30.36 m²

• 50.27 m²

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TEKS.MATH.7.9B

If you know the slant height and the radius, you can use the Pythagorean Theorem to find the:

• Area

• Height

• Vertex

• Circumference

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TEKS.MATH.7.9B

The formula for A = 3.14 r² can be used to determine the area of a circle, where A is the area and r is the distance from the center of the circle to the outside edge. If the area of a circular garden is 700 square feet, about how far is the distance from the center of the garden to the outside edge? Round to the nearest tenth.

• 14.9 feet

• ± 14.9 feet

• 26.5 feet

• ±26.5 feet

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TEKS.MATH.7.9B

What do you call the red line in this circle?

• Radius

• Diameter

• Chord

• Transversal

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TEKS.MATH.7.9B

Find the circumference of a circle with a diameter of 10 m.

• 31.4 m

• 314 m

• 3.14 m

• 3140 m

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TEKS.MATH.7.9B