Determine the circumference of a circle with a diameter of 13. Round your answer to the tenths place.
a.132.7 units
b.40.8 units
c.530.9 units
d.81.7 units

Question

Determine the circumference of a circle with a diameter of 13. Round your answer to the tenths place.
a.132.7 units
b.40.8 units
c.530.9 units
d.81.7 units

mathstudent55 · Answer

Do you know the formula of the circumference of a circle?

eboogie4 · Answer

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mathstudent55 · Answer

$C = \pi d = 2 \pi r$

mathstudent55 · Answer

Use 3.14 for $\pi$.
d is the diameter.

eboogie4 · Answer

@Adrianna.Gongora 
@Anaise 
@Bookworm14 
@Daniellelovee

shadowlegendx · Answer

@mathstudent55 laid it out perfectly.

Use the formula

$$Circumference = \pi d$$

$$\pi = 3.14 $$

d = diameter

shadowlegendx · Answer

What is the diameter in this problem?

eboogie4 · Answer

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shadowlegendx · Answer

You want us to do the problem for you...?

bookworm14 · Answer

TO find the circumference you must use 2 * pi * radius OR pi * diameter

insert your diameter

13 * pi = what?

bookworm14 · Answer

@Eboogie4  what is 13 * pi

shadowlegendx · Answer

This would be your circle: http://prntscr.com/a6r2ox But you should try work through the problem, and not relying upon an online tool.

eboogie4 · Answer

40.82

mathstudent55 · Answer

C = (pi)d = 3.14 * 13 = 40.82
You are correct.