Find Circumference - Given Radius or Diameter

What does "circumference" mean?

• Space a circle takes up
• Distance around a circle
• Line from one side of a circle to another
• Line from center of circle to side

Tags

CCSS.7.G.B.4

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

• Diameter
• Radius

Tags

CCSS.HSG.CO.A.1

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

• Diameter
• Radius

Tags

CCSS.HSG.C.A.2

CCSS.HSG.CO.A.1

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

• 
  

  $C\ =\ \pi r$

• $c\ =\ \pi\left(2r\right)$

• $c=\pi d$

• $c\ =\ \pi\left(2d\right)$

Tags

CCSS.7.G.B.4

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

• 
  

  $c\ =\ \pi r$

• $c\ =\ \pi\left(2r\right)$

• $c\ =\ \pi d$

• $c\ =\ \pi\left(2d\right)$

Tags

CCSS.7.G.B.4

What is the diameter?

• 8
• 16
• 10
• 4

Tags

CCSS.7.G.B.4

What is the radius?

• 18
• 72
• 38
• 14

Tags

CCSS.7.G.B.4

What is the circumference?

• 48
• 96
• 24
• 18

Tags

CCSS.7.G.B.4

What is the circumference?

• 36
• 18pi
• 108pi
• 36pi

Tags

CCSS.7.G.B.4

Steven purchases a bowl. The diameter of the bowl is 14 cm. What is the circumference of the bowl?

• 28 cm
• 43.98 cm
• 87.96 cm
• 7 cm

Tags

CCSS.7.G.B.4