Circle Geometry

If the radius of this circle is 9 m, the diameter is...

• 4.5 m

• 18 m

• 28.26 m

• 27 m

If a circle has a radius of 10 ft. then which statement is true?

• The radius is 5 feet.

• The diameter is 5 feet.

• The radius is 20 feet.

• The diameter is 20 feet.

The distance across a circle through its center is called the _____.

• Center

• Radius

• π

• Diameter

The perimeter around a circle is the ____

• Perimeter

• Radius

• Diameter

• Circumference

The ratio between the circumference and the diameter of a circle is ____

• Congruent

• Diameter

• Pi

• Like term

Half the width of a circle when measured through its center is the ____

• Radius

• Diameter

• Circumference

• Area

The width of a circle when measured through its center is the ____

• Radius

• Diameter

• Circumference

• Area

If the area of a circle is 25 π in² , then the diameter is?

• 10 in

• 5 in

• 25 in

• pi in

The distance across a circle through its center is called the _____.

• diameter

• radius

• π

• center

A cruise ship has a large, circular window. It has a diameter of 6 meters. What is the window's approximate circumference?

• 3 m 

• 9.42 m

• 12 m

• 18.84 m