Diameter, Radius, and Circumference of Circles

If my radius is 10ft, what is my diameter?

• 20 ft

• 5 ft

• 31.4 ft

• 62.8 ft

What is the circumference of this circle ?

• 3.14 cm

• 37.68 cm

• 24 cm

• 68.4 cm

A circular swimming pool is 21 feet in diameter.

How many feet around is the pool?

• 10.5 ft

• 42 ft

• 65.94 ft

• 131.95 ft

The diameter of a circle is:

• The measurement around the circle.

• The distance from an edge of a circle to another edge.

• The distance from the center of the circle to an edge of a circle

• The distance from an edge of a circle to another edge through the center.

What is the distance around a circle?

• Circumference

• Area

• Diameter

• Radius

What is the diameter of this circle?

• 3.5

• 3

• 5

• 7

If the diameter of a circle is 10 mm, the circumference is approximately ___

• 314 mm

• 3.14 mm

• 31.4 mm

• 20 mm

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

• circumference

• area

• radius

• diameter

What is the circumference of a circle with a diameter of 9?

• 254.34

• 28.26

• 9.42

• 18.84

What is the radius if the diameter is 27?

• 135

• 13.5

• 1.35

• 0.135