Circumference

What is a radius? (More than one answer applies)

• line segment from the center onto one point of a circle

• Line segment that crosses the center and has two endpoints on the circle

• line segment that crosses from on point on the circle to the next point on the circle

• r=diameter/2

What is diameter?

• line segment from one point on the circle that lies on another point of a circle

• Line segment from the center that lies on one point on the circle

• line segment that lies in the center of a circle which has two endpoints on the circle

• d=2r

What is circumference and its formula?

• distance (amount) around a circle

• amount that is inside the circle

What is a chord?

• line segment that lies in the center of the circle with two endpoints on the circle

• line segment that lies on one point of the circle to another

• line segment that lies in the center and has one endpoint on the circle

• None of the Above

Which of these could represent pi? (Mark all that can apply)

• 3.24

• 3.14

Tom has a circular garden, and he wants to place a fence around it. The circular garden has a radius of 5 meters. What is the circumference of the circular garden? (Use 3.14 for pi)

• 30.4ft

• 30.4m

• 32m

• 31.4m

Circle A has a diameter of 1 foot. Circle B has a circumference of 1 meter. Which circle is bigger? (1 in=2.54 cm; 1m=100cm) (Use 3.14 for pi)

• Neither

  95cm=95cm

The circumference of Tyler's bike tire is 72 inches. What is the diameter of the tire? (Use 3.14 for pi and round to the nearest tenth)

• d=113.05 in

• d=226.1 in

• d=11.5 in

• d=22.9 in

In the park, there is a Ferris wheel with a diameter of 70 meters. How far does a rider travel in one full rotation around a Ferris wheel? (Use 3.14)

• 109.9m

• 219.9m

• 219.8m

• 220m

The diameter of a bike wheel is 30 inches. If a wheel travels 15 complete rotations, how far does the bike travel? (Use 3.14)

• 450 in

• 1413 in

• None of the above

• 94.2 in