Circles: Circumference and Area

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

• c = 15π
• c = 2π15
• c = π(15²)
• c = π(7.5²)

Tags

CCSS.7.G.B.4

Find the area of the circle below.

• 113.04 cm units²
• 18.84 cm units²
• 9 cm units²
• 28.26 cm units²

Tags

CCSS.7.G.B.4

What is the diameter of this circle?

• 3.5
• 6.5
• 6
• 7

Tags

CCSS.7.G.B.4

What is the radius of this circle?

• 18
• 36
• 9
• 6

Tags

CCSS.7.G.B.4

Find the circumference of the circle

• 21.98
• 153.86
• 43.96
• 615.44

Tags

CCSS.7.G.B.4

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

• Radius

• Diameter

Tags

CCSS.HSG.C.A.2

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

• Radius
• Diameter

Tags

CCSS.4.G.A.1

What is the radius?

• 18

• 72

• 38

• 14

Tags

CCSS.7.G.B.4

Find the circumference (to the nearest whole number)

• 88 in
• 44 in
• 116 square in
• None of the above

Tags

CCSS.7.G.B.4

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

• Diameter
• Radius

Tags

CCSS.4.G.A.1

CCSS.4.G.A.2