Radius Diameter Circumference

The numbers below are measurements of radius, diameter, and circumference of Circles X and Y. Circle X is smaller than Circle Y. Which of the following could be measurements for circle Y?

• 5

• 9

• 10

• 28.26

• 31.4

• 452

• 113

• 38

• 19

A circle's circumference is approximately 22 ft. The circle's _________ is approximately 3.5 ft.

• area

• circumference

• diameter

• radius

A dog is tied to a wooden stake in a backyard. His leash is 3 meters long and he runs around in circles pulling the leash as far as it can go. What should you find in order to know how much space the dog have to run around in?

• area

• circumference

• diamter

• radius

A dinner plate has a radius of 7 centimeters. What would you need to find in order to know how much paint is needed to paint the plate?

• area

• circumference

• diameter

• radius

A straight line passing from side to side through the center of a circle

• circumference

• radius

• diameter

• scale factor

The distance around a circle

• diameter

• radius

• scale factor

• circumference

A straight line from the center to the circumference of a circle

• diamter

• radius

• circumference

• scale factor