Area and Circumference of a Circle

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.

If my diameter is 19 inches, what is my radius?

• 38 inches

• 9.5 inches

• 59.66 inches

• 119.32 inches

If my radius is 10ft, what is my diameter?

• 20ft

• 5ft

• 31.4ft

• 62.8ft

A DVD has a diameter of 15 millimeters. Which equation would help you determine the circumference?

• c = 15π

• C = 2π15

• c = 15 ÷ π

• c = 15 π

What is the diameter?

• 8

• 16

• 10

• 4

The diameter of a circle is 8 cm. What is the approximate area of the circle?

• 25 cm squared

• 50 cm squared

• 201 cm squared

A flower pot has a circumference of 35 inches. What is the approximate length of the radius of the flower pot?

• 3.3 inches

• 5.6 inches

• 6.8 inches

• 11.1 inches

Sadie has 38 inches of fringe to sew around a circular pillow. What is the approximate diameter of the largest pillow she can use?

• 6 inches

• 9 inches

• 10 inches

• 12 inches

The perimeter of a circle is usually called the...

• radius

• diameter

• circumference

• area