8.4 Circles: Circumference & Area

What is the measurement around the outside of a circle called?

• Diameter

• Circumference

• Radius

• Center

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

• Radius
• Diameter

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

• Radius
• Diameter

Tags

CCSS.HSG.C.A.2

What is the diameter?

• 5 in
• 10 in
• 3.14 in
• 15.84 in

Tags

CCSS.7.G.B.4

What do we call the red line?

• Chord
• Arc
• Diameter
• Segment

Select each Radius in the image. (There may be more than one)

The radius is twice the diameter.

• Yes it is!!!

• No it's not!!

Tags

CCSS.7.G.B.4

If the radius is 4, the diameter is

• 2

• 4

• 8

Tags

CCSS.7.G.B.4

What is the radius if the diameter is 10 m ?

• 5
• 20
• 2

Tags

CCSS.7.G.B.4

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

• diameter
• radius
• π
• center