Circumference and perimeter

What is the formula for the circumference of a circle?

• $C\ =\ \frac{1}{2}BH$

• $C\ =\ \pi r^2$

• $C\ =\ 2\pi r$

• $C\ =\ BH$

Tags

CCSS.7.G.B.4

What is the circumference of a circle when the radius is 6cm?

• $6\pi\ cm$

• $12\pi\ cm$

• $6\ cm$

• $36\pi\ cm$

Tags

CCSS.7.G.B.4

Find the perimeter of the figure...

• 15 feet

• 26 feet

• 20 feet

• 25 feet

Tags

CCSS.3.MD.D.8

What is the diameter?

• 5 in
• 10 in
• 3.14 in
• 15.84 in

Tags

CCSS.7.G.B.4

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

• Diameter
• Radius

Find the circumference of the circle.

• 113.04 in

• 1017.36 in

• 254.34 in

• 56.52 in

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

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

• Diameter
• Radius

Find the circumference of the circle.

• 113.04
• 1017.36
• 254.34
• 56.52

Tags

CCSS.7.G.B.4

What is the diameter of this circle?

• 3.5
• 3
• 5
• 7

Tags

CCSS.7.G.B.4