Circumference and Area of a Circle

What is the formula for circumference of a circle given the diameter?

• C = π r
• C = 2 π r
• C = π d
• C = 2 π d

Tags

CCSS.7.G.B.4

The _____ is the distance from the center to any point on the circle.

• diameter
• radius
• π
• center

Tags

CCSS.HSG.C.B.5

The distance across a circle through its center is called the _____.

• diameter
• radius
• π
• center

Tags

CCSS.HSG.C.A.2

A _____ is half of a circle.

• circumference
• pi
• semicircle
•  composite figure

If you are given the diameter, how can you calculate the radius?

• Multiply the diameter by 2
• Divide the diameter by 2
• Add 2 to the diameter
• Subtract 2 from the diameter

Tags

CCSS.7.G.B.4

Match the following

• Diameter

• The distance from the middle the edge of a circle.

• Circumference

  (diameter)

• The distance from one side of the circle to the other.

• Circumference

  (radius)

• Area

• Radius

Tags

CCSS.7.G.B.4

Sunshine Preschool has a merry-go-round that measures 36 inches from the center to the edge.

What is the circumference of the merry-go-round, in inches?

Round to the nearest hundredth!

Mathematical Equivalence

ON

Tags

CCSS.7.G.B.4

• 3.11

• 3.12

• 3.14

• 3.15

Tags

CCSS.7.G.B.4

• 6

• 1

• 9

• 5

Tags

CCSS.HSA.SSE.A.2