Question

If the circumference of a circle is 12, and the angle measure of an arc is 60o, which is the length of the arc?
2
3
6
12

Answer 1

Find the radius using the formula to find the circumference of a circle.

C = 2pi r

12 = 2(3.14)r

Solve for 'r', can you do that?

Answer 2

Oh wait..the equation to find the arc length is:

\(\sf 2 \pi r(\dfrac{\theta}{360})\)

Answer 3

2pi r is the same as the circumference..which in this case is 12.

So we have:

\(\sf 12(\dfrac{\theta}{360})\)

And the angle measurement here is 60, so plug it in and simplify, can you do that?

Answer 4

Thanks man

Answer 5

No problem.