Circumference and Area

What is π ? (Best Choice)

• The ratio of the circumference of any circle to its diameter.
• Exactly 3.14
• Exactly 3.1415
• Exactly 3.141593

Tags

CCSS.HSG.GMD.A.1

A Circle has a radius of 4. What is the circumference of the circle? (Best Choice)

• 4π or about 12.56

• 16π or about 50.24

• 2π or about 6.28

• 8π or about 25.1

A Circle has a radius of 4. What is the area of the circle? (Best Choice) (note: units are squared)

• 4π or about 12.6

• 16π or about 50.3

• 2π or about 6.3

• 8π or about 25.1

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

• 3π or about 9.4 in

• 6π or about 18.8 in

• 12π or about 37.7 in

• 36π or about 113.0 in

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

• 3π or about 9.4 in²

• 6π or about 18.8 in²

• 12π or about 37.7 in²

• 36π or about 113.1 in²

What is the diameter?

• 8

• 16

• 10

• 4

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

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

• Radius
• Diameter

What is the area of this circle? Rounded to the nearest tenth. All units are squared.

• 452.4

• 139.1

• 113.1

• 84.2

The radius is 8 inches. What is the circumference?

• 50.5 inches

• 25.1 inches

• 12.6 inches

• 200.9 inches