Surface Area and Circumference

Diameter 32 inches
What is the radius?

• 16 inches

• 64 inches

• 96 inches
  96 inches

• 16 ft 

Radius 4 inches
Find the circumference of the circle. 

• 25.12 in

• 12.56 in

• 50.24 in

• 200.96 in

Diameter 13.5 in
Find the circumference of the circle.

• 84.79 in

• 42.39 in

• 21.195 in

• 572.265 in 

A bicycle tire has a diameter of 20 inches. How many inches is one full revolution of the wheel?  

• 31.4 in

• 1256 in

• 125.6 in

• 62.8 in

A circle pool has a radius of 7.5 ft. Monica wants to know how many ft of a pool cover she needs to buy?

• 23.55 ft²

• 176.63 ft²

• 47.1 ft²

• 706.5 ft²

Ray wants to build a fence around his circular garden outside. The garden has a radius of 6 ft. How many feet of fencing does he need?

• 37.68 ft

• 18.84 ft

• 113.04 ft

• 452.16 ft

Trevor is making a tablecloth for a circular table with a diameter of 40 inches. How many inches of tablecloth does he need? 

• 125.6 in²

• 251.2 in²

• 1256 ft²

• 1256 in²

Other than the formula C=πd what is another formula for circumference of a circle?

• C=2π

• C=2πr

• C=πr²

• C=πd²

What formula is this used for:
πd

• Area

• Circumference 

• Surface Area

• Volume 

What formula is used to find the distance around a circle?

• Area

• Surface area

• Circumference

• Volume