Area and Circumference of Circles

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

Tags

CCSS.7.G.B.4

Here is a picture of a Ferris wheel. It has a diameter of 80 meters.How far does a rider travel in three complete rotations around the Ferris wheel?

• 753.6 meters

• 251.2 meters

• 125.6 meters

• 376.8 meters

Tags

CCSS.7.G.B.4

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

• Radius

• Diameter

What is the radius of this circle?

• 18

• 36

• 9

• 6

Tags

CCSS.7.G.B.4

What is the diameter of this circle?

• 3.5

• 6.5

• 6

• 7

Tags

CCSS.7.G.B.4

What is the diameter?

• 5 in

• 10 in

• 3.14 in

• 15.84 in

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

Mrs. Apple just bought a new dinning room table. She needs to make a table cloth for decoration. What amount of fabric should she buy if the table has a diameter of 5 feet? Choose the equation that would best help solve this problem.

• C = π5

• C = (2)(π)(2.5)

• A = π5²

• A = π2.5²

Tags

CCSS.7.G.B.4

A ball has a circumference of 9.42 cm. What is the diameter?

• 29.5788 cm

• 59.1576 cm

• 3 cm

• 1.5 cm

Tags

CCSS.7.G.B.4

Find the radius of a circle if the circumference is 37.7 cm

• 2cm

• 3cm

• 5cm

• 6cm

Tags

CCSS.7.G.B.4