Find the arc length problem inquiry

Hello,

I'm studying for my pre-cal exam tomorrow and I'm not sure about a question...

**Find the length of an arc of a circle radius 8m if the arc subtends a central angle of 1 rad. **

I multiplied 1 rad by pi, and reasoned that Pi= 180 degrees

Then I followed the formula, S= R*theta

S= 8*180 degrees

My answer was 1440.

Usually, when an answer is this simple, I'm doing something completely wrong. How can I solve this problem?

Thanks in advance.

Re: Find the arc length problem inquiry

Wait... is the answer 8... ?>.<?

Oh man I'm so confused.

Re: Find the arc length problem inquiry

Quote:

Originally Posted by **theadage;772757[B**

Find the length of an arc of a circle radius 8m if the arc subtends a central angle of 1 rad. [/B]

The *radian* comes the idea that one radian subtends an arc of length one radius.

Therefore, the arc has length 8m.

Re: Find the arc length problem inquiry