Labeling Parts of a Circle

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

• radius

• diameter

• circumference

• area

Is the red line a radius or diameter of the circle?

• Radius

• Diameter

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

• radius

• diameter

• area

• circumference

Is the red line a radius or diameter of the circle?

• Radius

• Diameter

What is the diameter?

• 8

• 16

• 10

• 4

What is the radius?

• 18

• 72

• 38

• 14

If the radius of a circle is 8 cm, the diameter is 16 cm.

• TRUE

• FALSE

From the center of this CD to the edge of the CD is 4 inches. How far is the distance all the way across the CD?

• 16 in

• 8 in

• 12 in

• 2 in

What is the circle's diameter?

• 5 cm

• 10 cm

• 20 cm

If my radius is 10ft, what is my diameter?

• 20ft

• 5ft

• 31.4ft

• 62.8ft