Pi Circumference and Area of Circle

What is circumference?

• The distance around a circle.

• The space inside the circle.

• The length of the straight line segment that passes through the center of the circle and whose endpoints lie on the circle.

• The line from the center of a circle to any point on its edge.

What is the area of a circle?

• The distance around a circle.

• The space inside the circle.

• The length of the straight line segment that passes through the center of the circle and whose endpoints lie on the circle.

• The line from the center of a circle to any point on its edge.

Find the circumference of the circle

• 87.82in

• 153.86in

• 43.96in

• 307.72in

Find the area of the circle

• 43.96 units²

• 153.86 units²

• 87.82 units²

• 307.72units²

What is the area of this circle?

• 452.39 cm²

• 139.12 cm²

• 113.1 cm²

• 84.23 cm²

A jar lid has a diameter of 32 millimeters. What is the circumference of the lid to the nearest tenth?

• 100.5 mm

• 96.3 mm

• 115.6 mm

• 69.9 mm

The diameter of Joanne’s bicycle wheel is 18 inches. What is the circumference to the nearest tenth?

• 28.3 in

• 27 in

• 56.5 in

• 54 in

The circular fountain in front of the library has a radius of 8.8 feet. What is the circumference of the fountain to the nearest tenth?

• 55.3 ft

• 26.4 ft

• 48.8 ft

• 27.6 ft

If the word problem is asking you to find the space inside the circle, which formula should you use?

• r = d/2

• d = 2r

• C = πd

• A = πr²

If the problem ask you to find the distance around a circle, which formula should you use?

• r = d/2

• d = 2r

• C = πd

• A = πr²