Circles: Circumference and Arc Length

Circles:
Circumference and
Arc Length Using Central Angles

By Keith Webb

Math Response

Find the circumference of a circle which has a diameter of 15 cm in terms of π.

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Correct Answer: 15\pi

Deg^°

Rad

Math Response

Find the circumference of a circle which has a diameter of 15 cm. Use π = 3.14.

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Correct Answer: 47.1

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Rad

Math Response

Find the circumference of a circle which has a radius of 4 inches in terms of π.

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Correct Answer: 8\pi

Deg^°

Rad

Math Response

Find the circumference of a circle which has a radius of 50 feet. Use π = 3.14.

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Correct Answer: 314

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Rad

Math Response

Given Circle P, the measure of arc AB

equals 45° and the circumference

of the circle is 64 π cm.

Find the length of arc AB in terms of π.

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Correct Answer: 8\pi

Deg^°

Rad

Math Response

Given Circle P, the measure of arc AB

equals 135° and the circumference

of the circle is 64 π cm.

Find the length of arc AB. Use π = 3.14.

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Correct Answer: 75.36

Deg^°

Rad