Area, Circumference, Diameter of a Circle

The homeowners association wants to enclose the playground in a fence. How much fencing will they need to purchase? Is this question finding the area or the circumference?

• area

• circumference

• neither

Tags

CCSS.7.G.B.4

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)

Tags

CCSS.7.G.B.4

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)

Tags

CCSS.7.G.B.4

The _______ of a circle is the distance around the circle.

• radius

• diameter

• circumference

If the diameter is 10, what is the circumference?

• 15.70796327

• 31.41592654

Tags

CCSS.7.G.B.4

What is the formula for calculating the circumference of a circle?

• C = 2πr

• C = πr^2

• C = πd

• C = 2r

Tags

CCSS.7.G.B.4

What is the area of this circle?
d = 8cm

• 16π

• 8π

• 4π

• 36π

Tags

CCSS.7.G.B.4

A cruise ship has a large, circular window with a diameter of 6 meters. Approximately what is the window's circumference?

• 18 meters

• 12 meters

• 19 meters

• 6 meters

Tags

CCSS.7.G.B.4

The radius of the circle is 9 meters. What is the circle's circumference?

• 56.52 m

• 28.26 m

• 18 m

Tags

CCSS.7.G.B.4

Serena drew a circle with a circumference of 157 centimeters. What is the approximate diameter of the circle she drew?

• 1.57 cm

• 50 cm

• 15.7 cm

• 25 cm

Tags

CCSS.7.G.B.4