Circle Applications Fall 2021

What is the length of the radius in this picture?

• 3.5 in

• 7 in

• 14 in

• 49 in

What is the length of the diameter in this picture?

• 4 in

• 8 in

• 16in.

• 32in

What is the diameter of the circle in the image?

• 10

• 20π

• 20

• 100

What is the circumference? Leave your answer in terms of pi.

• 36πft.

• 18πft.

• 64πft.

• A.

• B.

• C.

• D.

• E.

If the circumference of a circle is 22 π ft, what is the diameter?

• 22 ft

• 11ft

• $\sqrt{22}$ ft

• not enough info

Alex has trained his puppy, Popper, to jump through a ring. According to Alex's measurements and calculations, the ring has a diameter of 3.5 feet. What is the ring's circumference (use 3.14 for pi)?

• 11.32 ft
• 12.25 ft
• 10.99 ft
• 8.75 ft

Find the area of the circle. Leave your answer in terms of pi.

• 7π units²

• 49π units²

• 14π units²

• 196π units²

What is the area of this circle?

Use 3.14 for pi.

• 138.16 units

• 1519.76 units

• 121 units

• 6079.04 units

A rose garden is circular. The diameter of the garden is 18 feet. What is the area of the garden? Leave your answer in terms of pi.

• 9π square feet

• 36π square feet

• 81π square feet

• 324π square feet