1. ## Triangle help request.

Hello,
I'm having trouble solving this problem. I've been trying for hours but still have not come up with the solution. I'd really appreciate it if someone could give me a hand. Thanks in advance.
Note: I drew the picture myself so it might differ from the original.

2. Is the angle at a suppose to be a central angle, the vertex at the center?

3. Yeah, sorry. I know my drawing's bad.

4. In that case the measure of angle a is twice that of b.

5. Thanks alot!
So that means that b is 60 and a is 120 right?

6. Yes.
May I suggest you get an Helix-Oxford geometry set; about 5 bucks...