Area and Circumference of a Circle

• Area of a circle

• Circumference of a circle

• Diameter of a circle

• Volume of a sphere

If the radius of a circle is 8 meters, what is the diameter?

• 16 meters

• 32 meters

• 8 meters

• 4 meters

What operation is performed on the radius to find the area of a circle?

• Doubling

• Halving

• Squaring

• Tripling

• 80,110 km

• 12,750 km

• 25,500 km

• 40,055 km

How do you calculate the radius if you know the diameter of a circle?

• Multiply the diameter by 2

• Divide the diameter by 2

• Square the diameter

• Subtract 2 from the diameter