Circle Practice 2

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

• Radius
• Diameter

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

• Radius
• Diameter

What is the diameter?

• 8
• 16
• 10
• 4

What is the radius?

• 18
• 72
• 38
• 14

What is the diameter?

• 5 in
• 10 in
• 3.14 in
• 15.84 in

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

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

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

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

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

C=π x d  or C = 2 x π x r

• 20ft

• 5ft

• 31.4ft

• 62.8ft