Perimeter and Circumference

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

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

The distance around an object is called the 

• area
• perimeter

A cruise ship has a large, circular window. It has a diameter of 6 meters. What is the window's perimeter? (Use 3.14 for pi.)

• 21.25 m²

• 19.55 m²

• 15.36 m²

• 18.84 m

Tags

CCSS.7.G.B.4

What is the diameter of this circle?

• 3.5
• 3
• 5
• 7

Tags

CCSS.7.G.B.4

What is the perimeter?

• 24 sq cm
• 24 cm
• 35 sq cm
• 35 cm

Tags

CCSS.4.MD.A.3

What is the perimeter of this square?

• 7 cm

• 14 cm

• 21 cm

• 28 cm

Tags

CCSS.4.MD.A.3