Intro to Circles

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

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

• radius

• diameter

• circumference

• area

Label the picture.

a

b

c

d

e

f

Secant

Chord

Radius

Tangent

Minor Arc

Center

The distance across the circle through the center is called the...

• radius

• diameter

• circumference

• area

The space contained inside of a circle is called the...

• radius

• diameter

• circumference

• area

If a circle has a radius 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.

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.

How many Radii equals a diameter?

• 1

• 2

• 3

• 4