Circle Circumference and Area

A circular window has a diameter of 24 inches.  A piece of metal is to go around the window for a frame. How long does the metal need to be? (Best Choice)

• 24π or about 75.36 in

• 12π or about 37.68 

• 576π or about 1,808.64 in

• 144π or about 452.16 in 

A center circle on a basketball court has a diameter of 12 feet.  How long is the line that wraps around the circle? (Best Choice)

• 6π or about 18.84 ft

• 12π or about 37.68 ft

• 36π or about 113.04 ft

• 144π or about 452.16 ft

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.

The formula for finding the area of a circle is...

What is the area of the (top of the) flower pot? (Best Choice)

• 4π or about 12.56 in²

• 8π or about 25.12 in²

• 16π or about 50.24 in²

• 64π or about 200.96 in²

What is the diameter of this circle?

• 8cm

• 16cm

• 10cm

• 4cm

What is the radius of this circle?

• 18in

• 36in

• 9in

• 6in

find the area of the circle with radius 3 cm below.

• 100 cm²

• 225 cm²

• 28.26 cm²

Find the circumference C = 2rπ

• 87.92in

• 44 in

• None of the above

Daniel wants to buy cookies for her friend. The radius of a cookie is 5 inches. What is the cookie’s circumference? C = 2rπ

• 10 in

• 2.5 in

• 31.4 in