Circumference of Circle in Terms of Pi

Find the circumference of the circle in the image.

• 10π

• 20π

• 100π

• 20

Find the circumference, in "in terms of pi" of a circle with a DIAMETER of 8 inches.

• 4π inches

• 8π inches

• 16π inches

• 64π inches

Find the circumference, in "in terms of pi" of a circle with a RADIUS of 22 inches.

• 11π inches

• 22π inches

• 44π inches

• 484π inches

Find the circumference, in "in terms of pi" of a circle with a RADIUS of 8 inches.

• 8π inches

• 64π inches

• 4π inches

• 16π inches

What is Pi?

• Ratio of Circumference to diameter

• The distance around the outside of a circle

• The distance from one side of a circe to the other through the center

• The distance from the center of a circle to the outside

What does Pi represent?

• The ratio of a square's perimeter to its area

• The ratio of a circle's diameter to its circumference

• The ratio of a rectangle's length to its width

• The ratio of a circle's circumference to its diameter

A cruise ship has a large, circular window. It has a diameter of 6 meters. What is the window's approximate circumference?

• 3 m 

• 9.42 m

• 12 m

• 18.84 m

A circle has a diameter of 4 cm. What is its circumference?

• 4π cm

• 2π cm

• 8π cm

• 16π cm

A circle has a radius of 9 cm. What is its circumference?

• 9π cm

• 18π cm

• 4.5π cm

• 81π cm

A circle has a circumference of 40π inches. What is its diameter?

• 10 in

• 20 in

• 80 in

• 40 in