Ineed to know how to find the measures of different angles?

Question

For example they gave me a trapezoid and the upper left side is x+40 and the bottom left side is x. I need to find the measures. If anyone knows about angles or more specifically transversal lines, alternate interior lines, same sided interior angles, and corresponding angles. please write back. oh and leave your e-mail just in case i didnt get something. thanks

Answer 1

http://math.com/homeworkhelp/Geometry.html