Basic Intro to Circles

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

• The radius is 5 ft. 

•  The diameter is 5 ft

• The radius is 20 ft.

• The diameter is 20 ft.

Does this picture show the diameter or radius of a circle?

• Diameter

• Radius

Does this picture show the diameter or radius of a circle?

• Diameter

• Radius

The distance halfway across the circle is called the...

• radius

• diameter

• circumference

• area

Find the diameter of the circle.

• 5 units 

• 4 units

• 12.2 units

• 7.5 units

The _____ is the distance from the center to any point on the circle.

• diameter

• radius

• π

• center

Using the diagram above to identify the diameter of the circle.

• 81 units

• 13.5 units

• 10.1 units

• 101.3units

What is this called?

• Chord

• Minor Arc

• Circumference

• Secant

What is being represented in the image?

• Diameter

• Chord

• Radius

• Concentric Circles

The distance from the center of the circle to any point on the circle is called the...

• radius

• diameter

• circumference

• area