For the circle below, what statements are true (circle will be attached after)
1. If the measure of a (theta) is 1 radian, then the arc length is 2r.
2. If the measure of the (theta) is 60 degrees, then the arc length is r.
3. The ratio of arc length to r is always equal to pi.
4. If the ratio of an arc length to r is 1, then the measure of theta is 1 radian.

Question

For the circle below, what statements are true (circle will be attached after) 
1. If the measure of a (theta) is 1 radian, then the arc length is 2r.
2. If the measure of the (theta) is 60 degrees, then the arc length is r.
3. The ratio of arc length to r is always equal to pi.
4. If the ratio of an arc length to r is 1, then the measure of theta is 1 radian.

anonymous · Answer

attachment

parthkohli · Answer

Note:  Arc length is defined as $r \times \theta$ where $\theta$ is in radians.

anonymous · Answer

It said error where you put the math :p

parthkohli · Answer

Aww.  Refresh the page.

anonymous · Answer

okay I see it now, but I'm confused/

parthkohli · Answer

All right.  Do you know how a radian is defined?

anonymous · Answer

nope. i missed the lesson. so i have no idea

parthkohli · Answer

Awwie.  Well, the angle is the ratio of the arc length to the radius.  Remember this throughout your life.

parthkohli · Answer

So when the radius is equal to the arc, theta will have a value of 1 radian.

parthkohli · Answer

Err... it's really hard to explain this through a screen.  I promise I'd be much better sitting beside you.

anonymous · Answer

okay, well uhm. do you know the answer to this question though?

parthkohli · Answer

I do, but I am not allowed to say it.  :(

anonymous · Answer

well. then uhm. nvm.