Finding Circumference and Area of the Circle

Find the circumference of the circle.

• 18.8 cm

• 113 cm

• 37.7 cm

• 452.2 cm

Find the circumference of the circle.

• 38.47 cm

• 10.99 cm

• 43.96 cm

• 21.98 cm

Find the circumference of the circle.

• 14.13 cm

• 63.56 cm

• 28.26 cm

• 127.17 cm

The diameter of a circle is 3 centimeters. What is the circumference?

• 11.5cm

• 9.42 cm

• unicorns are narwahls

• 45.3 cm

Alex has trained his puppy, Popper, to jump through a ring. According to Alex's measurements and calculations, the ring has a diameter of 3.5 feet. What is the ring's circumference (use 3.14 for pi)?

• 11.32 ft

• 12.25 ft

• 10.99 ft

• 8.75 ft

What is the circumference of the circle ?
r=22in d=44in

• 222in

• 138.23in

• 125.23in

• 2.5in

Find the circumference of a circle with a diameter of 11 millimeters.

• 34.6 mm

• 30 mm

• 25.3 mm

• 34.54 cm

What two formulas can you use to find the circumference?

• C = π·d

• C = π·r²

• C = 2·π·r

• C = d²

What does d represent in the formula:

C = π·d

• diameter

• radius

• pi

• 3.14

What number represents π?

• 31.4

• 4.13

• 3.14

• 34.1