Circumference and Area of Circle

A cruise ship has a large, circular window. It has a diameter of 8 meters. What is the window's area?

• 31.25 m²

• 29.55 m²

• 30.36 m²

• 50.27 m²

What is the circumference of a circle with a radius of 21 cm?

• 131.9 cm

• 121.9 cm

• 111.9 cm

• 141.9 cm

What is the circumference of a circle with a radius of 3 cm?

• 18.9 sq. cm

• 28.3 cm

• 18.9 cm

• 28.3 sq. cm

What does "circumference" mean?

• Space a circle takes up

• Distance around a circle

• Line from one side of a circle to another

• Line from center of circle to side

If the diameter of a circle is 10 mm, the circumference is approximately ___

• 314 mm

• 3.14 mm

• 31.4 mm

• 20 mm

Brian made a tasty burger. The diameter of the
burger was 5 cm. What is the radius of the circle?

• 15.7 cm

• 10 cm

• 2.5 cm

• 31.4 cm

Find the area of the circle

• 56.52

• 254.34

• 1017.36

• 113.04

Find the area of a circle if you are given a diameter of 2.5 inches. Use 3.14 for π and round to the nearest tenths place

• 5 inches²

• 4.8 inches²

• 4.89 inches²

• 4.9 inches²

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

• c = 15π

• c = 2π15

• c = π(15²)

• c = π(7.5²)

The diameter of Carol's old records from the 80s is 12 inches. Which equation would help you determine the area?

• A = 12π

• A = 2π12

• A = π(12²)

• A = π(6²)