Question about statics equilibrium

Hello,

I need help about solving this question:
if AB and BC surfaces has no friction, and green bar has weight of "W" and "G" point is the center of gravity, find theta for green bar equilibrium. (20 and 50 are angels in degree)

[IMG]http://www.engineersedge.com/engineering-forum/attachment.php?attachmentid=1214&stc=1[/IMG]
anyone can help?

First, this post appears to be academic homework - which is prohibited on this forum. This thread will be locked unless you can demonstrate that this is not homework.

FYI: There are several related videos demonstrating static equilibrium calculations within Engineers Edge videos center.

[U][B][URL="http://www.engineersedge.com/video/videos/12/Engineering-Education/most_recent/all_time/"]Engineering Education Videos[/URL]

[/B][/U]
[U][B][URL="http://www.engineersedge.com/video/Static-Equilibrium-Equal-Angles-Two-Cables_v1497"]S[/URL][URL="http://www.engineersedge.com/video/Static-Equilibrium-Equal-Angles-Two-Cables_v1497"]tatic Equilibrium Calculations Method Video[/URL][/B][/U]