Area and Circumference

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

• Radius

• Diameter

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

• Radius
• Diameter

What is the radius of this circle?

• 18
• 36
• 9
• 6

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 of the circle

• 21.98
• 153.86
• 43.96
• 615.44

The radius is 8 inches.  What is the circumference?

• 50.24 inches
• 25.12 inches
• 12.56 inches
• 200.96 inches

A Circle has a radius of 6 inches.  What is the area of the circle? (Best Choice)

• 3π or about 9.42 in²
• 6π or about 18.84 in²
• 12π or about 37.68 in²
• 36π or about 113.04 in² 

Find the area of the circle

• 56.52
• 254.34
• 1017.36
• 113.04