Measuring Circumference of a Circle (5D)

To measure the circumference of a round paper plate,

what appropriate tool will you use?

• a compass

• a protractor

• a ruler

• a tape measure

If the radius of Circle A measures 15 cm,

what is its diameter?

• 7.5 cm

• 8 cm

• 20 cm

• 30 cm

If the diameter of a circle measures 16 cm,

what is its radius?

• 7.5 cm

• 8 cm

• 20 cm

• 32 cm

Zayn had a circular lagoon. The distance across the lagoon passing through the center is 25 meters. What is the distance around it?

Joana measured the circumference of a small pond using a string and found it to be 501.40 ft.

Find the radius of the track to the nearest foot. ____ft.

• 50

• 60

• 80

• 90