Well, I am trying to get geometry polygons and angles, but it's really hard to understand what to do. I'm not one to exaggerate and say I'm dying, but I'm pretty desperate for some help. If someone could explain the basics in simple terms or even post a helpful link I would really appreciate it. Below are examples of the type of geometry I am doing; It's probably really easy, but I can't seem to understand.

Question

Four of the angles of a pentagon measure 85*, 110*, 135*, and 95*. Find the measure of the missing angle.

Is line l parallel to line m? Explain. Note: Not drawn to scale.

Identify the sequence of transformations that maps quadrilateral ABCD onto quadrilateral A"B"C"D".

It won't let me post the graph thingys. Something about no URLs or whatever. Thanks.

Answer 1

Total Degrees = (N-2)*180 = (5-2)180=540

Missing Angle = 540-(85+110+135+95)=115o