Circles

Which are approximations of pi? Choose ALL that are correct.

• 3.41

• 3.14

• $\frac{circumference}{diameter}$

• $\frac{diameter}{circumference}$

• $\frac{22}{7}$

What is the radius of the circle?

• 3 feet

• 24 feet

• 6 feet

• 4 feet

What is the diameter of the circle?

• 2 feet

• 8 feet

• 16 feet

• 10 feet

What is the circumference of the circle?

• 12.56 sq ft

• 12.56 ft

• 25.12 sq ft

• 25.12 ft

What is the area of the circle?

• 25.12 ft

• 50.24 sq ft

• 50.24 ft

• 12.56 sq ft

Julian wants to put a decorative ribbon border around a platter. If the diameter of the platter is 12 inches, approximately how much ribbon will she need?

• 37.68 inches

• 37.68 sq inches

• 452.16 inches

• 452.16 sq inches

Rubino's Pizza sells a 16 inch pizza (diameter) for $13.99. What is the approximate area for the pizza?

• 50.24 inches

• 200.96 inches

• 50.24 sq inches

• 200.96 sq inches

The first Ferris wheel has a diameter of 260 feet. What is the circumference of the Ferris wheel?

• 816.4 ft

• 53,066 ft

• 816.4 sq ft

• 53,066 sq ft

A circular plate has a radius of 4.5 inches. Choose ALL statements that are correct.

• The diameter of the plate is 2.25 inches

• The diameter of the plate is 9 inches

• The circumference of the plate is approximately 28 inches

• The circumference of the plate is approximately 14 inches

You have bought a new circular rug. The rug has a radius of 5 feet. How much of the floor will the rug cover?

• 78.5 sq ft

• 78.5 ft

• 15.7 ft

• 15.7 sq ft