GED® Geometry: Perimeter & Circumference Mastery

A deep GED® Geometry course built around the distance AROUND a shape. Students master perimeter for rectangles, squares, triangles, regular polygons, and composite figures, then move to circles -- radius, diameter, pi, and circumference. The course also covers working backward from a known perimeter, telling perimeter apart from area, and real-world problems like fencing, framing, and trim. Every shape has a labeled diagram, every lesson has an interactive self-check, and every practice answer explains the method and adds a Pro tip.