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Circles

Study Slideshow

What is the formula to find the circumference of a circle?

Answer: C = 2πr or C = πd

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If the radius of a circle is 5 cm what is its circumference?

Answer: 31.4 cm

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Determine the circumference of a circle with a diameter of 14 meters.

Answer: 43.96 meters

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If the circumference of a circle is 31.4 cm what is its radius?

Answer: 5 cm

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Calculate the circumference of a circle with a radius of 8.5 cm.

Answer: 53.38 cm

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A circular garden has a circumference of 36 meters. Find the radius of the garden

Answer: 5.73 meters

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What is the relationship between the diameter and the circumference of a circle?

Answer: C = πd

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If the circumference of a circle is 18.84 cm what is its diameter?

Answer: 6 cm

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What is the formula to find the area of a circle?

Answer: A = πr²

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Find the area of a circle with a radius of 6 cm.

Answer: 113.10 cm²

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Determine the area of a circle with a diameter of 10 meters.

Answer: 78.54 m²

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If the area of a circle is 154 square centimeters find its radius.

Answer: 7 cm

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Calculate the area of a circle with a radius of 3.5 cm.

Answer: 38.48 cm²

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A circular pond has an area of 78.5 square meters. Find the radius of the pond.

Answer: 5 meters

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Explain how the radius and the area of a circle are related.

Answer: The area is proportional to the square of the radius (A ∝ r²).

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If the area of a circle is 50.24 square centimeters find its diameter.

Answer: 4 cm

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