Circumference and Area of Circles

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

• Radius

• Diameter

The distance across the circle through the center is called the...

• radius

• diameter

• circumference

• area

What is the radius of this circle?

• 12cm
• 6cm
• 24cm
• 3cm

Tags

CCSS.HSG.C.A.2

What is the diameter of this circle?

• 3.5
• 6.5
• 6
• 7

Tags

CCSS.7.G.B.4

What is the diameter?

• 5 in
• 10 in
• 3.14 in
• 15.84 in

Tags

CCSS.7.G.B.4

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.

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 circumference of the circle. ( use 3.14 for π)

• 21.98
• 153.86
• 43.96
• 615.44

Tags

CCSS.7.G.B.4

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

• 4π or about 12.56
• 16π or about 50.24
• 2π or about 6.28
• 8π or about 25.12

Tags

CCSS.7.G.B.4

What is the area of this circle? (use 3.14 for π)

• 62.59 cm²

• 113.1 cm²

• 18.84 cm²

• 28.26 cm²

Tags

CCSS.7.G.B.4