Area of Circle, Parallelogram, Circumference of Circle

The Ferris wheel at the State Fair of Texas is 450 feet across.  How many feet would a person travel if they rode around the Ferris wheel 6 times?

• 1,413 feet

• 2,826 feet

• 8,478 feet

• 4,239 feet

A semicircle opening above the entrance at Six Flags has a diameter of 15 feet.  What is the area of this opening?  Round to the nearest tenth.

• 706.5 square feet

• 47.1 square feet

• 88.3 square feet

• 176.6 square feet

Circumference is to circles as _____________________________ is to polygons.

• Area

• Volume

• Perimeter

• Surface Area

What is the formula for CIRCUMFERENCE of a circle?

• C=πd

• C=πd²

• A=πr²

• C=πβγΔ

What is the formula for area of a circle?

• C=πd

• C=πd²

• A=πr²

• A= C/d

What is the area of the circle?

• 15.7 cm²

• 78.5 cm²

• 31.4 cm²

• 5 cm²

What is the circumference of the circle?

• 25.12 in.

• 12.56 in.

• 50.24 in.

Sally tried to solve for the area of circle. Her work is shown. What mistake did Sally make.

• Sally squared π incorrectly.

• Sally multiplied the π and radius incorrectly.

• Sally used diameter instead of the radius.

• No mistake. Sally solved the problem correctly.

What is Circumference?

• π

• The distance around the outside of a circle

• The amount of space on the inside of a circle

Name the line show.

• Secant

• Diameter

• Radius

• Chord