Parts of a circle

Select each Radius in the image.

A chord that passes through the center of the circle is called the...

• Radius

• Diameter

• Arc

• circumference

The radius is twice the diameter.

• Yes it is!!!

• No it's not!!

If the radius is 4, the diameter is

• 2

• 4

• 8

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

• radius
• circumference
• diameter
• area

A line segment that joins two points on a curve is called_________________.

• radius
• chord
• diameter
• circumference

What is the radius if the diameter is 10 m ?

• 5
• 20
• 2

If the diameter of a circle is 24 ft, the radius is 48 ft.

• TRUE
• FALSE

If the diameter of a circle is 10 cm, the radius is 5 cm.

• TRUE
• FALSE

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

• Radius
• Diameter