Circumference and Area of Circle Using 3.14

The diameter of the wheel on a bicycle is 24 inches. Which is closest to the circumference of the wheel?

• 25.36 in

• 37.68 in

• 75.36 in

• 452.16 in

What is the formula to find the area of a circle?

• A = πd

• A = 2πr

• A = πr²

• A = xyz

What is the area of this circle?

• 50.27 cm²

• 78.23 cm²

• 98.12 cm²

• 201.06 cm²

The radius of the circle is 9 meters.  What is the circle's circumference?

• 9 meters

• 28.26 meters

• 56.52 meters

• 18 meters

• 43.96 feet

• 21.98 feet

• 87.92 feet

• 44 feet

• 50.24 meters

• 25.12 meters

• 100.48 meters

• 12.56 meters

• 25.12 cm

• 12.56 cm

• 50.24 cm

• 6.28 cm

• 10 meters

• 20 meters

• 5 meters

• 40 meters

What is the formula to find the area of a circle?