Circles Review

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

• Radius
• Diameter

What is the area of this circle? Use the Pi button.

• 452.39 cm²

• 139.12 cm²

• 113.1 cm²

• 84.23 cm²

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.

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.

What is the radius of this circle?

• 18
• 36
• 9
• 8

Tags

CCSS.7.G.B.4

What is the formula for area of a circle?

• A = π×r²
• A = 2×π×r

Tags

CCSS.7.G.B.4

Find the area of the circle below. Use 3.14 for Pi.

• 100 cm²

• 225 cm²

• 9 cm²

• 28.26 cm²

Tags

CCSS.7.G.B.4

Which number best represents a central angle?

• 1
• 2
• 5
• 9

• A
• B
• C
• D

Tags

CCSS.HSG.C.A.2

Solve for x. 

• 5
• 20
• 40
• 85

Tags

CCSS.HSG.C.A.2