Circle Review

A cruise ship has a large, circular window. It has a diameter of 6 meters. What is the window's approximate circumference?

• 3 m 
• 9.42 m
• 12 m
• 18.84 m

Find the area of the circle

What is the area of this circle?

• 62.59 cm²
• 113.1 cm²
• 19.81 cm²
• 28.26 cm²

What is the formula to find the area of a circle?

• πr²

• 2πr

• √π

What is the formula to find the circumference of a circle?

The diameter of the face-off circle on an ice-hockey rink is 30 feet. Find its area.

• 675.6 ft²
• 29.67 ft²
• 545.8 ft²
• 706.5 ft²

Find the circumference of a circle with a radius of 13.5 mm.

• 37.68mm
• 18.84mm
• 84.78 mm
• none of the above

A circular swimming pool is 21 feet in diameter.
How many feet around is the pool?

• 10.5 ft
• 42 ft
• 65.94 ft
• 131.95 ft

What is the area of the yellow?

• 78.5 mi²
• 19.625 mi²
• 39.25 mi²
• 31.4 mi²

If my circumference is 163.28ft, what is my radius?

• 52ft
• 26ft
• 3.14ft
• 163.28ft