8th grade math review

What is the distance around a circle?

• Circumference

• Area

• Diameter

• Radius

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 number represents π?

• 31.4

• 4.13

• 3.14

• 34.1

What is the area of this circle?

• 201.06 square meters

• 50.24 square meters

• 123.12 square meters

• 25.12 square meters

What is the circumference of this circle ?

• 3.14 cm 
• 37.68 cm
• 24 cm
• 68.4 cm

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.

What is the formula for area of a circle?

• A = π×r²
• A = 2×π×r

Find the volume of the Sphere

• 78.5 m³
• 392.5 m³
• 523.6 m³
• 62.8 cm³