Circles Circumference

Find the Circumference of the Quarter Circle with a radius of 16 cm.

• 26.12

• 100.48

• 25.12

• 50.24

Jalen, Connor, and Colin are planning to build a circular fish pond in their backyard with a radius of 10 cm. They need to build a fence around the pond to keep their pet dog, Jackson, from jumping in. Can you help them calculate the length of the fence they need using the formula 2πr? (Use π = 3.14)

• 62.8 cm

• 20 cm

• 15.7 cm

• 31.4 cm

The midfield circle on a soccer field has a diameter of 48 ft. Francine runs once around the midfield circle. To the nearest foot, how far does Francine run?

• 75 ft

• 124 ft

• 144 ft

• 151 ft

Justin’s bicycle has 24-inch diameter wheels. Justin pedals his bicycle enough for the wheels to complete exactly 40 revolutions. To the nearest whole number, how far does Justin travel?

• 2,880 in

• 75 in

• 5,024 in

• 3,014 in

The radius of the top of an eraser on a pencil is 2.5 millimeters . Find the circumference of the eraser to the nearest tenth.

• 49.3 mm

• 22.6 mm

• 15.7 mm

• 7.9 mm

A bicycle trail in the shape of a circle has a diameter of 3 miles. Kiersty biked around the trail 4 times. About how far did Kiersty bike? Use 3.14 for π.

• 38 miles

• 40 miles

• 35 miles

• 33 miles

Ellen baked a pie for her family dinner. She put foil around the edge of the pie while it was baking. What was the length of the foil, if the radius of the pie is 4 inches?

• 25.12

• 12.56

• 15.7

• 37.68

What is the perimeter of the semi-circle?

• 11 yd

• 17.27 yd

• 34.54 yd

• 28.27 yd

Find the Perimeter of the Semi-Circle.

• 46.26

• 56.52

• 14.13

• 28.26

What is the perimeter of this semi circle? (Use 3.14 = π and round to the nearest tenths place)

• 18.5

• 11.3

• 20.3

• 22.6