Area and Circumference of Circles

What is the circumference of a circle with a radius of 21 cm?

• 131.9 cm

• 121.9 cm

• 111.9 cm

• 141.9 cm

What is the circumference of a circle with a diameter of 56 m?

• 175.8 m

• 176.8 m

• 165.8 m

• 186.8 m

Find the circumference of a circle with a radius of 12.5 mm .

• 37.68mm

• 18.84mm

• 78.5mm

• none of the above

What is the area of this circle?

• 15393.8

• 1248.12

• 5930.12

• 3848.45

Find the area of the circle

• 56.52

• 254.34

• 1017.36

• 113.04

A minute hand (radius) of a clock is 13.8 meters long. What is the circumference of the clock?

• 86.66 meters

• 76.66 meters

• 66.66 meters

• 96.66 meters

The circumference of a circle is

• The measurement from an edge of a circle to another edge.

• The measurement around the circle

• The measurement from an edge of a circle to another edge going through the center

• The measurement from the center of the circle to an edge of the circle

A circular swimming pool is 21 feet in diameter.
How many feet around is the pool?

• 10.5 ft

• 42 ft

• 65.94 ft

• 131.95 ft

Find the area of the circle

• 43.96

• 153.86

• 87.82

• 307.72

find the area of the circle below.

• 100 cm

• 225 cm

• 9 cm

• 28.26 cm