Geometry

About the Author – Ron Larson received his Ph.D. in mathematics from the University of Colorado in 1970. At that time, he accepted a position with Penn State University in Erie, Pennsylvania, and currently holds the rank of professor of mathematics at the university. Ron is the lead author for over forty mathematics textbooks from 6th grade through calculus. Many of his texts, such as the 9th edition of his calculus text, are leaders in their markets. (Description by http-mart)