Circles Review

What is the diameter?

• 5 in

• 10 in

• 3.14 in

• 15.84 in

Is the red line a radius or diameter of the circle?

• Radius

• Diameter

How long is the radius of this circle?

• 4cm

• 2cm

• 8cm

• 16cm

Find the diameter.

• 38.2 ft

• 40.2 ft

• 38.4 ft

• 39.8 ft

If the radius is 8 ft, what is the diameter?

• 4 ft

• 18 ft

• 16 ft

• 2 ft

If the diameter is 50 m, what is the radius?

• 100 m

• 30 m

• 25 m

• 200 m

Find the Circumference (round to nearest tenth):
diameter = 12 in.

• 37.7 in.
• 37 in.
• 38 in.
• 75.4 in.

Find the Circumference (round to nearest tenth):
radius = 8 m

• 50.5 m
• 50 m
• 25.1 m
• 50.2 m

A circle has a radius of 9. What is it's area?

• 63.62

• 245.74

• 254.47

• 1017.88