Circle Review

Does this picture show the diameter or radius of a circle?

• Diameter
• Radius

What does "circumference" mean?

• Space a circle takes up
• Distance around a circle
• Line from one side of a circle to another
• Line from center of circle to side

What is the diameter?

• 8
• 16
• 10
• 4

What is the circumference of this circle?

• 3.14 cm 
• 37.7 cm
• 24 cm
• 68.4 cm

Find the circumference of a circle with a diameter of 11 millimeters.

• 34.6 mm
• 30 mm
• 25.3 mm
• 34.54 cm

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

• 37.68mm
• 18.84mm
• 78.54mm
• none of the above

The radius of the circle is 9 meters.  What is the circle's circumference?

• 9 meters
• 28.26 meters
• 56.52 meters
• 18 meters

A cruise ship has a large, circular window. It has a diameter of 6 meters. What is the window's approximate circumference?

• 3 m 
• 9.42 m
• 12 m
• 18.84 m

What is the diameter?

• 6.5
• 15
• 26
• 78

What is the radius?

• 28
• 15
• 26
• 13