This packet is the best High School Geometry study guide for a student preparing to take an end of course exam. This packet has all the formulas a student will need and they are accompanied by dynamic visuals. Rigorous topics like partitioning of a line segment, and dilations not centered at the origin are covered using both a formula and a visual/conceptual method. Centers of a circle (circumcenter, incenter, centroid, median), trigonometry, congruence, transformations, circle theorems, volume and surface area, and density are covered as well. For years my students have used this study guide to prepare for their end of course exam back when I made it by hand on grid paper, copied for the class, and they absolutely swear by it. Now that I've put it on the computer with visuals and color coding they find this a lifesaver. You can use it all year round or give it to students closer to a big exam so that they have an aid as they do practice packets. I hope your students will find it as helpful as mine did in preparing for those big tests!