Mathematics 700 Fundamentals - Unit 9: Measurement and Area CIRCUMFERENCE
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
