Circumference of a Circle

What is the radius of this circle?

• 18 ft
• 72 ft
• 38 ft
• 14 ft

What is the circumference of the circle?

• 36 ft
• 18π ft
• 108π ft
• 36π ft

A bicycle tire has a radius of 27 inches. What is the circumference of the tire?

• 27π inches
• 13.5 inches
• 81 inches
• 54π inches

What is the diameter of this circle?

• 5 in
• 10 in
• 3.14 in
• 15.84 in

A DVD has a radius of 15 millimeters. What is the circumference in terms of pi?

• 30π mm
• 15π mm
• 15π mm
• 30 mm

What is the circumference of a circle with a radius of 11 inches in terms of pi?

• 11π
• 22π
• 5.5π
• 6π

What is the diameter?

• 8 cm
• 16 cm
• 10 cm
• 4 cm

What is the circumference of a circle with a radius of 9 inches in terms of π?

• 9 π square units
• 18 π square units
• 25 π square units
• 50 π square units

What is the distance around a circle?

• Circumference
• Area
• Diameter
• Radius

The circumference of a circle is...

• The measurement from an edge of a circle to another edge.
• The measurement around the circle
• The measurement from an edge of a circle to another edge going through the center
• The measurement from the center of the circle to an edge of the circle