Unit 7 Review

The radius of a circle is ​ (a)   the diameter.

• half
• twice
• triple

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

• Radius
• Diameter

What is circumference?

• The distance around a circle (like it's perimeter).

• The space inside the circle.
• A line from side to side passing through the center.
• A line from the center to the side.

• 18
• 36
• 9
• 8

• 60.00 ft

• 35.17 ft

• 28.67 ft

• 47.17 ft

Which segment is NOT a radius?

• CA
• CB
• CD
• LM

_{Find the Circumference.}

Circumference : C=dπ or C=2πr

Round to 1 decimal place if needed.

What is the circumference?

Circumference : C=dπ or C=2πr

Round to 2 decimal places if needed.

• 37.68 inches
• 18.84 inches
• 113.04 inches
• 432.16 inches

• 100 cm²

• 225 cm²

• 9 cm²

• 28.26 cm²