About the Author

Ron Larson is a professor of mathematics at Penn State University at Erie, where he has taught since receiving his Ph.D. in mathematics from the University of Colorado. Dr. Larson is well known as the author of a comprehensive program for mathematics that spans middle school, high school, and college courses. Dr. Larson’s numerous professional activities keep him in constant touch with the needs of teachers and supervisors. He closely follows developments in mathematics standards and assessment


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McDougal Littell







About the Author

Laurie Boswell

Lee Stiff

Ron Larson

Timothy D. Kanold

About Geometry
In Geometry, you will develop reasoning and problem solving skills as you study topics such as congruence and similarity, and apply properties of lines, triangles, quadrilaterals, and circles. You will also develop problem solving skills by using length, perimeter, area, circumference, surface area, and volume to solve real-world problems.
In addition to its geometry content,
Geometry includes numerous examples and exercises involving algebra, data analysis, and probability. These math topics often appear on standardized tests, so maintaining your familiarity with them is important. To help you prepare for standardized tests, Geometry provides instruction and practice on standardized test questions in a variety of formats—multiple choice, short response, extended response, and so on. Technology support for both learning geometry and preparing for standardized tests is available at