Circumference of a Circle

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

• 20ft
• 5ft
• 31.4ft
• 62.8ft

What is the distance around a circle?

• Circumference
• Area
• Diameter
• Radius

What is the formula for finding the circumstance of a circle with just the diameter?

•  π*d
• b*h
• l*w*h
• I do not know

What is the diameter?

• 8
• 16
• 10
• 4

What is the radius?

• 18
• 72
• 38
• 14

What is the formula for finding the circumstance of a circle with just the Radius?

• π*2r

• b*h

• l*w*h

• I do not know

A DVD has a diameter of 15 millimeters. What is the circumference?

• c = 15π
• C = 2π15
• c = 15/π
• c = 15/2π

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

A circle has a diameter of 17 inches. What is the circumference?

• 106.76 inches

• 53.38 inches

• 907.46 inches

• 34 inches