When I was a young high school student in Cuba back in the 60's, professor Baldor book came to my rescue when I was faced with introductory courses in Geometry and Trigonometry. It was difficult to grasp all those concepts in a class full of very young people not very inclined to understand these two new branches of Math. However, Prof. Baldor eased my way into this new knowledge with this appealing book teeming with exercises and easy to grasp explanations. I am fortunate to find a copy of this book now on my third age that will allow me to refresh all these slew of Math concepts once again.