Circumference

Circumference is the distance around a circle. For most other shapes we use the term perimeter.

• True

• Not True

Answer explanation

Remember:

Diameter = the width of a circle

Radius = half of the width of a circle

• I remember.

• I forgot, but I'm good now.

Answer explanation

$diameter\ =\ 2\left(radius\right)$
$radius\ =\ \frac{1}{2}\left(diameter\right)$

Tags

CCSS.7.G.B.4

Circumference is found by multiplying  $\pi$  by the diameter. 

It could also be said that Circumference is able to be found by multiplying  $\pi$  by twice the radius

• True

• Not True (this is the wrong answer)

Answer explanation

 $C=\pi d=2\pi r$  

Tags

CCSS.7.G.B.4

A circle having a diameter of 68 would have a circumference of....

 $C=\pi d=2\pi r$  

• 32 $\pi$  

• 136 $\pi$  

• 68 $\pi$  

• 34 $\pi$  

Answer explanation

 $C=\pi d=2\pi r$  

Tags

CCSS.7.G.B.4

A circle having a diameter of 29 would have a circumference of....

 $C=\pi d=2\pi r$  

• 58 $\pi$  

• 29 $\pi$  

• 14.5 $\pi$  

• 34 $\pi$  

Answer explanation

 $C=\pi d=2\pi r$  

Tags

CCSS.7.G.B.4

A circle having a diameter of 8 would have a circumference of....

 $C=\pi d=2\pi r$  

• 8 $\pi$  

• 16 $\pi$  

• 4 $\pi$  

• 32 $\pi$  

Answer explanation

 $C=\pi d=2\pi r$  

Tags

CCSS.7.G.B.4

A circle having a radius of 27 would have a circumference of....

 $C=\pi d=2\pi r$  

• 27 $\pi$  

• 54 $\pi$  

• 13.5 $\pi$  

• 7 $\pi$  

Answer explanation

 $C=\pi d=2\pi r$  

Tags

CCSS.7.G.B.4

A circle having a radius of 47 would have a circumference of....

 $C=\pi d=2\pi r$  

•  $47\pi$  

•  $23.5\pi$  

•  $18\pi$  

•  $94\pi$  

Answer explanation

 $C=\pi d=2\pi r$  

Tags

CCSS.7.G.B.4

A circle with a circumference of  $18\pi$  would have a radius of.

 $C=\pi d=2\pi r$  

• 3

• 6

• 9

• 12

Answer explanation

 $C=\pi d=2\pi r$  

Tags

CCSS.7.G.B.4

A circle with a circumference of  $56\pi$  would have a radius of.

 $56\pi$  

• 28

• 56

• 112

• 12

Answer explanation

 $C=\pi d=2\pi r$  

Tags

CCSS.7.G.B.4