Circumference & Graphing Circles: Grade 6 Challenges

A circular garden has a radius of 5 meters. What is the circumference of the garden in meters? (Use π ≈ 3.14)

• 25.0 meters

• 40.0 meters

• 15.7 meters

• 31.4 meters

If a circular track has a circumference of 400 meters, what is the radius of the track in meters? (Use π ≈ 3.14)

• 50.24

• 100.00

• 80.00

• 63.66

A pizza has a diameter of 12 inches. What is the circumference of the pizza in inches? (Use π ≈ 3.14)

• 25.12 inches

• 40.84 inches

• 37.68 inches

• 31.42 inches

You want to draw a circle on a coordinate plane with a radius of 3 units. What is the circumference of the circle?

• 3π units

• 6π units

• 12π units

• 9π units

A circular fountain has a circumference of 62.8 feet. What is the diameter of the fountain in feet? (Use π ≈ 3.14)

• 15 feet

• 30 feet

• 20 feet

• 25 feet

If you convert the circumference of a circle from centimeters to meters, how would you express 150 cm in meters?

• 1500 millimeters

• 1.5 meters

• 1.5 kilometers

• 0.15 meters

A circular swimming pool has a radius of 7 feet. If you want to graph this pool on a coordinate plane, what would be the circumference?

• 14π feet

• 21 feet

• 28π feet

• 14 feet

A bicycle wheel has a diameter of 26 inches. How far does the bicycle travel in one complete rotation of the wheel? (Use π ≈ 3.14)

• 85.3 inches

• 81.64 inches

• 90 inches

• 78.5 inches

You are making a circular table with a circumference of 31.4 inches. What is the radius of the table in inches? (Use π ≈ 3.14)

• 4 inches

• 5 inches

• 7 inches

• 6 inches

If a circular track is graphed on a coordinate plane with a center at (0,0) and a radius of 4 units, what is the circumference of the track?

• 12π units

• 4π units

• 8π units

• 16π units