ACA: Circles Review

A circle has a diameter of 17 inches. What is the area?

• The area of the circle is 34.56 square inches.
• The area of the circle is 50.24 square inches.
• The area of the circle is 100 square inches.
• The area of the circle is 227.07 square inches.

The radius of a circle is ​ ________   the diameter.

• half

• triple

• twice

• quadruple

A circle has a diameter of 12 cm. What is the circumference?

• 24 cm
• 15.7 cm
• 10 cm
• 37.7 cm

A circle has a radius of 12 in. What is the area?

• 452.39 sq in
• 96 sq in
• 24 sq in
• 144 sq in

What formula can be used to find area of a circle?

• A = 2πr
• A = 3r^2
• A = 4πr

What is the distance around a circle?

• Perimeter
• Area
• Circumference
• Diameter

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

• 40.25 m²

• 3.36 m²

• 50.55 m²

• 28.26 m²

What is the circumference of a circle with a diameter of 56 m?

• 112 m
• 45 m
• 224 m
• 176 m

A circular swimming pool is 21 feet in diameter.

How many square feet is the area of the pool?

• 346.36 square feet
• 279 square feet
• 125 square feet
• 42 square feet

What is the formula for finding the circumference of a circle?

• 2r
• 3.14r
• 2πr