I never had geometry in high school or college, yet I picked up this book, though I don't remember where, and instantly could understand anything it talked about! OK, all the algebra and other stuff I've had may have helped, but I found this book so easy to get into that I sooon became proficient at applying geometry to all kind of everyday situations. Need to know how high that tree is? Gimme a tape measure and a prottractor and I can tell you! A cool fun book!