Area and Circumference of a Circle

Radius of a circle is 5 cm. What is the circumference of this circle?

• $6\pi$

• $10\pi$

• $16\pi$

• $12\pi$

The diameter of a circle is 10 in. What is the circumference of this circle?

• $10\pi$

• $14\pi$

• $6\pi$

• $8\pi$

Find the radius of a circle whose circumference is  $12\pi$  miles.

• 4 mi

• 7 mi

• 6 mi

• 3 mi

Find the circumference of a circle whose area is  $49\pi\$ square feet.

•  $10\pi$  ft

•  $14\pi$  ft

•  $8\pi$  ft

•  $16\pi$  ft

The area of a circle is  $25\pi$  squared inches. What is the circumference of this circle?

•  $16\pi$  in

•  $12\pi$  in

•  $14\pi$  in

•  $10\pi$  in

A circle has radius of 9 yards long. What is the area of this circle?

• $64\pi$ squared yards

• $36\pi$ squared yards

• $121\pi$ squared yards

• $81\pi\$ squared yards

What is the area of a circle whose diameter is 24 kilometers long?

• $81\pi$ squared kilometers

• $64\pi$ squared kilometers

• $121\pi$ squared kilometers

• $144\pi$ squared kilometers

How long is the radius of a circle that has an area of  $121\pi$  squared centimeters?

• 9 cm

• 6 cm

• 11 cm

• 10 cm

What is the area of a circle whose circumference is  $10\pi$  feet?

•  $9\pi$  squared feet

•  $25\pi$  squared feet

•  $64\pi$  squared feet

•  $36\pi$  squared feet

Circumference =  $24\pi$  cm
Find the area of this circle.

•  $49\pi$  squared centimeters

•  $144\pi$  squared centimeters

•  $81\pi$  squared centimeters

•  $100\pi$  squared centimeters