Circle Area and Circumference Challenge for Grade 7

A circular garden has a radius of 5 meters. What is the area of the garden?

• 15π square meters

• 25π square meters

• 20π square meters

• 30π square meters

A pizza has a diameter of 12 inches. Calculate the area of the pizza.

• 12π square inches

• 36π square inches

• 48π square inches

• 24π square inches

If you cut a sector of the pizza that has a central angle of 90 degrees, what is the area of that sector?

• (1/2) * π * r²

• (1/4) * π * r²

• (1/8) * π * r²

• (3/4) * π * r²

A circular swimming pool has a radius of 10 feet. What is the circumference of the pool?

• 62.83 feet

• 78.54 feet

• 50.24 feet

• 31.42 feet

A circular track has a radius of 20 meters. What is the area of the track?

• 400π square meters

• 250 square meters

• 500π square meters

• 300π square meters

If a runner completes one lap around the track, how far do they run?

• 400 meters

• 200 meters

• 800 meters

• 600 meters

A circular table has a diameter of 1.5 meters. What is the area of the table?

• 1.7671 square meters

• 3.1416 square meters

• 0.7854 square meters

• 2.3562 square meters

If you want to place a circular tablecloth on the table, how much fabric do you need to cover the entire surface?

• Area = 4πr² (where r is the radius)

• Area = πd² (where d is the diameter)

• Area = 2πr (where r is the radius)

• Area = πr² (where r is the radius of the table)