diameter

What is the diameter?

• 8
• 16
• 10
• 4

Find the radius of a circle who's diameter is 40 ft.

• 40ft
• 80ft
• 20ft
• 45ft

What is the radius of a circle?

• the perimeter of a circle
• the space inside the circle
• the line that goes through the middle of a circle
• half of the line that goes through the middle of a circle

What is the diameter of a circle?

• the distance around the outside of a circle
• the line that goes across the circle through the center
• half of the line that goes through the center of the circle
• the space inside the circle

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

• TRUE
• FALSE

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

• TRUE
• FALSE

Radius = 10 m
Diameter = ?

• 20 m
• 5 m
• 10 m
• 1 m

The radius of a circle is 3 cm.  What is the circle's diameter?

• 9.4 cm
• 6 cm
• 18.8 cm

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