Circumference

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

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

• Diameter
• Radius

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

• Diameter
• Radius

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

• C = π ⋅r
• C =  π⋅2r
• C = π⋅d
• C = π⋅2d

What is the diameter?

• 8 cm
• 16 cm
• 10 cm
• 4 cm

Steven purchases a bowl. The diameter of the bowl is 14 cm. What is the circumference of the bowl?(rounded to the nearest hundredths place)

• 28 cm
• 43.98 cm
• 87.96 cm
• 7 cm

Cynthia wants to buy a round photo frame for her brother. The radius of the photo frame is 9 cm. What is the photo frame’s diameter?

• 28.26 cm
• 56.52 cm
• 4.5 cm
• 18 cm

Determine the radius of the penny

• 59.66 mm
• 9.5 mm
• 38 mm
• 119.32 mm

What is the circumference of this circle rounded to the nearest tenths place?

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

Find the circumference of a circle with a diameter of 11 millimeters in terms of π.

• 34.6π mm
• 11π mm
• 22π mm
• 3.14 π mm