Circles Retake

 $Find\ the\ area\ of\ the\ circle,\ use\ 3.14\ for\ \pi$  Round to the nearest tenths place. 

• 22 in

• 38.5  $in^2$  

• 153.9  $in^2$  

• 11  $in^2$  

What is the circumference of the circle? Use 3.14 for π.

• 34.54 cm

• 379.93 cm

• 94.985 cm

• 69.08 cm

A little boy stands on a carousel and rotates around the ride 4 times. If the distance between the little boy and the center of the carousel is 6 feet, then how many feet did the little boy travel? Use 3.14 for π.

• 75.36 ft

• 452.16 ft

• 37.68 ft

• 150.72 ft

The circumference of the circle in the picture is 28.26 cm. What is the radius? Use 3.14 for π.

• 9 cm

• 4.5 cm

• 3 cm

• 177.5 cm

A cell phone tower picks up signals within a 25 mile radius. How many square miles of coverage does the cell phone tower provide? Use 3.14 for π.

• 78.5 $mi^2$

• 157 $mi^2$

• 490. 625 $mi^2$

• 1,962.5 $mi^2$

What is the area of the circle? Use 3.14 for π

• $452.16\ ft^2$

• 113.04 $ft^2$

• 37.68 $ft^2$

• 36.24 $ft^2$

7) The area of the circle in the picture is 28.26 sq ft. What is the radius? Use 3.14 for π.

• 2 ft

• 3 ft

• 9 ft

• 4.5 ft

A hula hoop measures 14 inches from the center to the outside. What is the distance around the hula hoop? Use 3.14 for π. Round to the nearest tenth.

• 87.92 in

• 175.84 in

• 43.96 in

• 87.9 in

A circle has a diameter of 16 inches. Which formula represents how to find the area of the circle?

• $\pi16^2$

• $\pi8^2$

• $16\pi^2$

• $2\pi8$
  

10) The area of a tire is 78.5 inches. Determine the radius of the tire. Use 3.14 for π.

• 5 in

• 25 in

• 10 in

• 15 in