Circumference Cycle Review

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

• 20ft
• 5ft
• 31.4ft
• 62.8ft

If my diameter is 19 inches, what is my radius?

• 38 inches
• 9.5 inches
• 59.66 inches
• 119.32 inches

The diameter of a circle is:

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

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 a circle with a diameter of 10 meters?

• 5 meters
• 15.7 meters
• 3.14 meters
• 31.4 meters

What is the circumference of this circle?

• 3.14 cm

• 37.68 cm

• 6 cm

• 68.4 cm

What is the formula for circumference of a circle given the diameter?

• C = π x radius

• C = 2 x π x radius

• C = π x Diameter

• C = 2 x π x Diameter

Which of the following is the closest estimate of the circumference of the circle in cm?

• 15 cm

• 45 cm

• 30 cm

• 10 cm

What is the closest estimate of the circumference of the circle?

• 24"

• 32"

• 16"

• 54"

What is the perimeter of the semi-circle?

• 11 yd
• 17.27 yd
• 34.54 yd
• 28.27 yd