Circles and Circum

What is the diameter?

• 8

• 16

• 10

• 4

What is the radius?

• 18

• 72

• 38

• 14

What is the diameter of a circle with a radius of 5.5 cm?

• 5.5 cm

• 2.25 cm

• 11 cm

• A:LKFJ:LSKFJ

• Diameter is: DE
• Diameter is: BA
• Diameter is: BC
• Diameter is: DC

• Radi are: DE & BC

• Radi are: BC

• Radi are: BC, BA & BD

• Radi are: BE, DC & AD

The diameter of a circle is:

• The measurement around the circle.

• The distance from an edge of a circle to another edge.

• The distance from the center of the circle to an edge of a circle

• The distance from an edge of a circle to another edge through the center. 

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

• Radius

• Diameter

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

• 40ft

• 80ft

• 20ft

• 45ft

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

• Radius

• Diameter

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

• Diameter

• Radius