TEKS.MATH.7.9B

Hannah drew a circle with a radius of 30 cm. Jonas drew a circle with a radius of 20 cm. What is the approximate difference in the areas of their circles?

• 2,826 cm²
• 1,570 cm²
• 1,256 cm²
• 314 cm²

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TEKS.MATH.7.9B

What is the diameter of this circle?

• 3.5
• 3
• 5
• 7

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TEKS.MATH.7.9B

What is the circumference?

• 36
• 18π
• 108π
• 36π

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TEKS.MATH.7.9B

Find the area of the circle

• 56.52
• 254.34
• 1017.36
• 113.04

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TEKS.MATH.7.9B

What is the area of this circle?

• 8322.13
• 1134.11
• 4536.46
• 1267.09

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TEKS.MATH.7.9B

what is the area of this semicircle ?

• 100.48cm²
• 80cm²
• 200.96cm²
• none of the above

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TEKS.MATH.7.9B

If my diameter is 19 inches, what is my radius?

• 38 inches
• 9.5 inches
• 59.66 inches
• 119.32 inches

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TEKS.MATH.7.9B

A DVD has a diameter of 15 millimeters. What is the circumference?

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

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TEKS.MATH.7.9B

A circular window has a diameter of 24 inches.  A piece of metal is to go around the window for a frame. How long does the metal need to be? (Best Choice)

• 24π or about 75.36 in
• 12π or about 37.68 
• 576π or about 1,808.64 in
• 144π or about 452.16 in 

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TEKS.MATH.7.9B

a straight line passing from side to side through the center of a body or figure, especially a circle or sphere

• Diameter

• Chord

• Secant

• Tangent

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TEKS.MATH.7.9B