Parts of a Circle Area

What is the radius?

• 18 ft

• 72 ft

• 38 ft

• 14 ft

Is the red line a radius or diameter of the circle?

• Radius

• Diameter

What is line segment CB?

• diameter

• center

• circumference

• radius

What is the area of this circle? Use 3.14 as π. Round the answer to the nearest tenths.

• 163.2 cm²

• 113.1 cm

• 124.2 cm²

• 113.1 cm²

What is the area of this circle? Use the calculator π button. Round the answer to the nearest hundredths.

• 1385.44 ft²

• 2142.12 ft²

• 5541.77 ft²

• 1289.12 ft²

The diameter of the face-off circle on an ice-hockey rink is 30 feet. Find its area. Use 3.14 as π.

• 675.6 ft²

• 29.67 ft²

• 545.8 ft²

• 706.5 ft²

Ms. Kellock is using a compass to find her way out of the woods at Robbins Park. The compass has a radius of 4 centimeters. What is the compass's area?

• 49.2 cm²

• 25.12 cm²

• 50.24 cm²

• 55.9 cm²

The diagram shows the spot on a basketball court called the “key”. What is the area of the key? Use 3.14 for π . (Hint: Don't forget that it is a semicircle! )

• 284.52 ft²

• 228 ft²

• 113.04 ft²

• 56.52 ft²

What is the area of a circle with a radius of 5 in terms of π ?

• 5 π square units

• 10 π square units

• 25 π square units

• 50 π square units

Find the area of this composite shape. Use 3.14 as π.

• 16.56 sq in

• 7.14 sq in

• 10.28 sq in