# Thread: Finding length of subtended arc.

1. ## Finding length of subtended arc.

I'm having some trouble understanding the following problem:

An angle measuring 5π/6 radians has its vertex at the center of a circle whose radius is 7 meters. Find the length of the subtended arc.

I think I know what the picture looks like, but how do I find that length?

2. Originally Posted by Murphie
I'm having some trouble understanding the following problem:

An angle measuring 5π/6 radians has its vertex at the center of a circle whose radius is 7 meters. Find the length of the subtended arc.

I think I know what the picture looks like, but how do I find that length?
Have you been taught the formula $l = r \theta$ ?

Alternatively, 5π/6 radians is 5/12 of 2π. So the arclength is 5/12 of the circumference.