Circle Circumference Volume of a Circle

What is π ? (Best Choice)

• The ratio of the circumference of any circle to its diameter.

• Exactly 3.14

• Exactly 3.1415

• Exactly 3.141593

what is the circumference of this circle ?

• 3.14 cm 

• 37.68 cm

• 24 cm

• 68.4 cm

A Circle has a radius of 4.  What is the area of the circle? (Best Choice) (note: units are squared)

• 4π or about 12.56

• 16π or about 50.24

• 2π or about 6.28

• 8π or about 25.12

What is the area of the circle? (Best Choice)

• 5π or about 15.7 cm²

• 10π or about 31.4 cm²

• 25π or about 78.5 cm²

• 100π or about 314 cm² 

What is the distance around a circle?

• Circumference

• Area

• Diameter

• Radius

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

• Radius

• Diameter

What is the diameter of this circle?

• 3.5

• 3

• 5

• 7

Meg swam from one side of her circular pool to the other side going through the center.  If Meg swam 8 feet, what is the approximate circumference of Meg's pool?

• 16 feet

• 25.12 feet

• 251.2 feet

• 4 feet

A circle has a radius of 17 inches. What is the circumference?

• 106.76 inches

• 53.38 inches

• 907.46 inches

• 34 inches

What is the radius of this circle?

• 18

• 10

• 9

• 8