Circles Circumference

What is the perimeter of the semi-circle?

• 11 yd

• 17.27 yd

• 34.54 yd

• 28.27 yd

If a Circle has a radius of 3 cm and a diameter of 6cm , what is the circumference of the circle? 

• 9.42 cm

• 18.84 cm

If a circle has a circumference of 26.69 yards, what is it's diameter?

• 8.5 yards

• 83.8 yards

• 4.2 yards

• 17.6 yards

A circle has a radius of 150 mm. What is it's circumference? 

• 471 mm

• 942 mm

• 47.7 mm

Ms. Boyett wants to build a circular swimming pool with a fountain in the center. She wants the fountain to be 18.6 feet from the edge of the pool. What would the distance be around the outside of the pool? 

• 116.8 yards

• 58.4 feet

• 58.4 yards

• 116.8 feet

What is circumference?

• The distance around a circle.

• The space inside the circle.

• A line from side to side passing through the center.

• A line from the center to the side.

Alex has trained his puppy, Zoey, 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

A circle has a diameter of 4.5 cm. A larger circle has a diameter of 24 cm. What is the approximate difference in the circumferences of the two circles?

• 19.5 cm

• 28.5 cm

• 61 cm

• 90 cm

The diameter of a quarter is 24.26 mm. What is closest to the circumference of the outer edge of the quarter? Use 3.14 for Pi.

• 76.18 mm

• 38.01 mm

• 463 mm

• 1,848 mm

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