Circles Warm Up - 4/11/24

How much cement would be needed to cover this circular parking lot?

• 1385.44 square feet

• 2142.12 square feet

• 5541.77 square feet

• 1289.12 square feet

Blake is cutting circles out of construction paper. Each circle has a radius of 6 inches.

How much paper will he use to cut 10 circles (round your answer to the nearest tenth of a square inch)?

Use 3.14 for 𝜋.

• 37.7 in²

• 376.8 in²

• 113.0 in²

• 1130.4 in²

The top of a pickle jar has an opening with a radius of 8 centimeters. What is the circumference of the opening of the pickle jar to the nearest hundredth of a centimeter?

Use 3.14 for 𝜋.

• 12.56 cm

• 25.12 cm

• 50.24 cm

• 200.96 cm

A large pizza has a diameter of 14 inches. A medium pizza has a diameter of 10 inches. How much larger is the area of the large pizza than the area of the medium pizza?

Round your answer to the nearest hundredth of an inch.

Use 3.14 for 𝜋.

• 12.56 in²

• 50.24 in²

• 75.36 in²

• 78.50 in²

• 153.86 in²

The circumference of the wheel on Roy's bicycle is 225 in.

What would you do to determine the radius of the wheel?

• Divide the circumference by 𝜋.

• Divide the circumference by 𝜋 to find the diameter; then divide the diameter by 2 to find the radius.

• Multiply the circumference by 𝜋.

• Multiply the circumference by 𝜋 to find the diameter; then divide the diameter by 2 to find the radius.

A stained-glass window is in the shape of a semicircle. The distance across the bottom of the window is 26 inches. A builder wants to buy trim for the window. How much trim work will he need to purchase to completely frame the window?

• 66.82 inches

• 40.82 inches

• 81.64 inches

• 107.64 inches