Geometry is that section of math that deals with lines and shapes instead of just numbers. If you have trouble understanding geometry, you're not alone Plenty of people have had trouble with geometry, even those skilled at other branches of mathematics. So if you can't look at a triangle without flinching, don't worry--help is on the way. Throughout the book, you will go over the major geometrical concepts, from points and lines to three-dimensional solids. Geometry isn't impossible; you can and will learn it. Just believe in yourself, and you might find that geometry isn't as difficult as you thought.