Mathematics 700 Fundamentals - Unit 9: Measurement and Area CIRCUMFERENCE

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The circumference of the earth is about 25,000 miles. Approximately how far is it from any point on the earth's surface to its center?

3,981 miles

A circular tabletop has a circumference of 94.2 inches. What is its diameter?

30 in.

The radius of a clock face is 8.5 centimeters. What is the circumference of the clock?

53.38 cm

A quarter has a diameter of approximately 24 millimeters. What is its circumference?

75.36 mm

What is the radius of a circle that has a circumference of 81.64 meters? Round your answer to the nearest whole number.

C = 13 yd

What is the circumference of a circle that has a radius of 10 centimeters? Round your answer to one decimal place.

C = 62.8 cm

What is the circumference of a circle that has a diameter of 25 yards? Round your answer to one decimal place.

C = 78.5 yd

What is the diameter of a circle that has a circumference of 56.52 feet? Round your answer to the nearest whole number.

d = 18 ft

diameter

the distance across a circle through the center

circumference

the distance around the outside of a circle

radius

the distance from the center of a circle to any point on the circle

pi

the ratio of the circumference of a circle to its diameter; approximately 3.14


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