How do I calculate the intersection of two lines

I wanted to know how to find the location where two lines intersect, with the information their starting points and their angles.

Thank you.

There's a formula for this, unfortunately I dont have my formula book handy, and I can't find the right one online, if this isn't solved by tomorrow I can help

well i don't understand it but look at

I took a look at this topic and not help me, just have examples and they are down, the one who got down close my construct of nowhere.

This site has a formula for it.

http://paulbourke.net/geometry/pointlineplane/