There's several rules you need to know. So it gave you 2 angles, 118 and 108.
One rule is that a straight line equals 180, so angle n must equal (180-118=62). Same goes for a, (180-108=72) It tells you with that little square that the angle up top equals 90 degrees. So, every angle near it that forms a straight line must be 90 because (180-90=90)
Another rule is that triangles add up to 180, since you know a is 72, and now you know that the angle above it is 90, you do 180-90-72=k. So, k=18 degrees. Since these are all parallel lines, g=j+h (another rule) Which is why you'd know c is 108 and g is 108. Angle below 108 must be 72. 108+72=180. There's another rule! A parallelogram must add up to 360. The diagonal angle from c is also 108 and e equal 72. Makes sense because they add up to 360 now. (If they're diagonal from each other they're equal if they're on parallel lines, and they are.)
Here's another one, c=m+n because it's a rule... We already knew b equals 108 so that's another way we would've figured m+n is 108. Due to the previously discussed rule, you know the angle under b is 72, so you know the angle under g is 72 (parallel lines...)
So essentially, all you have to do is know the rules to find these angles. Angles that form a straight line equal 180. A triangle equals 180. A parallelogram equals 360. If the lines are parallel, the angles corresponding to each other are the same angle. Angles formed on the parallel lines that make a parallelogram have equal angles diagonal from each other. The little box equals 90 degrees.
Oh, and n=p because they're on parallel lines. That might help. There's too much to type to you, so I hope that summary helped.
