Ch8 - Circles & Composite Figures

What is the diameter?

• 8
• 16
• 10
• 4

A DVD has a diameter of 15 millimeters. Which equation would help you determine the circumference?

• c = 15π

• C = 2π15

• c = 15 ÷ π

• c = 15+π

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

• Radius
• Diameter

Find the area of the circle

• 43.96
• 153.86
• 87.82
• 307.72

What is the area of this circle?

• 8322.13 cm²

• 1133.54 cm²

• 4536.46 cm²

• 1267.09 cm²

What is the area of this circle?

• 452.39 cm²

• 139.12 cm²

• 113.04 cm²

• 84.23 cm²

What is circumference?

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

The radius is 8 inches.  What is the circumference?

• 50.24 inches
• 25.12 inches
• 12.56 inches
• 200.96 inches

The circumference is 62.8 inches.  What is the radius?

• 20 inches
• 10 inches
• 6.28 inches
• 31.4 inches

What is the area of a circle?

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