Radius, Diameter, and Circumference Activity

What is the blue line on this image representing?

• Diameter

• Radius

• Circumference

• Center

What is the red line on this image representing?

• Diameter

• Circumference

• Radius

What is name of this shape?

• Square

• Rectangle

• Pizza

• Circle

What is the blue line on this shape representing?

• Diameter

• Radius

• Circumference

1. 1. What is the diameter of this circle?

• 11 m

• 22 m

• 5. 5.5 m

• 20 m

2. 2. What is the radius of this circle?

• 24 yd

• 12 yd

• 24 cm

• 12 cm

3. 3. What is the diameter of this circle?

• 4.5 in

• 45 in

• 7 in

• 9 in

4. 4. What is the radius of this circle?

• 7 in

• r

• 3.5 in

• 14 in

What is the formula for circumference?

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What is the formula for radius?

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