Find Circumference, Radius, and Diameter

To find the circumference of a circle, you must multiply the ________________ by 3.14.

• circumference

• area

• radius

• diameter

To go from diameter to radius, what do I need to do?

• divide by 3.14

• multiply by 3.14

• multiply by 2

• divide by 2

Q1. What is the distance from the center of a circle to its edge?

• A) center

• B) diameter

• C) radius

• center
• diameter
• radius

Find the circumference of a circle with a radius of 12.5 mm.

• 37.68mm

• 18.84mm

• 78.5mm

• none of the above

What is the radius?

• 18

• 72

• 38

• 14

The circumference of the circle is 56.52 meters. What is the circle's radius?

• 9 meters

• 28.26 meters

• 56.52 meters

• 18 meters

A circular swimming pool is has a circumference of 65.94 ft. What is the diameter of the pool?

• 207.05 ft

• 42 ft

• 21 ft

• 10.5 ft

To go from radius to diameter I need to do what?

• divide by 2

• multiply by 2

• multiply by 3.14

• divide by 3.14