7th Circles

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

• Diameter
• Radius

What is the radius of this circle?

• 12
• 6
• 24

The number pi is approximately equal to _________. 

• 3.14
• 3
• whatever the diameter equals 

If the diameter of a circle is 50 yards, the radius is _____

• 100 yards
• 25 yards
• 150 yards
• 15 yards

A line that goes from one end of the circle to the other and crosses the center point.  

• center
• diameter
• dime eater
• radius

Find the Circumference (round to nearest tenth):
diameter = 12 in.

• 37.7 in.
• 37 in.
• 38 in.
• 75.4 in.

What is circumference?

• The distance around a circle.
• The space inside the circle.
• A line from side to side passing through the center.
• A line from the center to the side.

Find the Circumference (round to nearest tenth):
radius = 8 m

• 50.5 m
• 50 m
• 25.1 m
• 50.2 m

Which of these is the correct formula for the AREA of a circle?

What is the area of a circle?

• The distance around a circle.
• The space inside the circle.
• A line from side to side passing through the center.
• A line from the center to the side.