Help students learn essential geometry concepts with this step-by-step series. Starting with constructing geometric shapes using a compass, ruler, or protractor, students progress through line segments, arcs, circles, triangles, polygons, perpendicular lines and more. Theorems and postulates are presented informally with short explanations, then are developed using follow-up practice activities. Each book also includes a handy glossary of essential concepts and a post-test to check understanding