Module 9 Part 1

A circle has a 6 inch diameter, what is the circumference?

• 1884

• 1.884

• 18.84

• 188.4

A circle has a 20 meter diameter, what is the circumference?

• 31.4

• 62.8

• 124.16

• 248.32

A circle has a radius of 10 inches, what is its circumference?

• 31.4 in

• 62.8 in

• 124.16 in

• 248.32 in

 A circle has a circumference of 9 $\pi$ yd, find its radius and diameter.

• r=9, d=4.5

• r=9, d=18

• r=18, d=4.5

• r=4.5, d=9

A circle has a diameter of about 3.8 in, find the radius and the circumference.

• r=1.9 , c=11.93

• r=11.93 , c=23.86

• r=7.6 , c=11.93

• r=1.9 , c=7.6

If a circle has a diameter of 34 m, its area is: ____  $m^2$  

If the circle has a diameter of 40 yd., the area is____  $yd^2$  

A DVD's diameter is 12cm so, its area should be ____   $cm^2$  

 $C=8\pi$  What is the area?

 $C=\pi\div6$  what is the area?