Circles HW

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

• Radius
• Diameter

Find the area of the circle

• 43.96
• 153.86
• 87.82
• 307.72

Jayne has a very large circular lollipop that has a circumference of 25.12 inches. What would the diameter of Jayne’s lollipop be? Use π = 3.14.

• 4 in.
• 8 in.
• 12 in.
• 16 in.

The radius is 8 inches.  What is the circumference?

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

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.

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.

How do you find the radius?

• π*2
• d/2
• π*r
• I do not know

If r = 4, d = ?

• 4

• 2

• 8

• 8π

What is the diameter of the circle in the image?

• 10

• 20π

• 20

• 100

A circle as a circumference of 36π meters. What is the radius of the circle?

• 36 meters

• 6 meters

• 12 meters

• 18 meters