Key to Geometry introduces students to a wide range of geometric discoveries as they do step-by-step constructions. Using only a pencil, compass, and straightedge, students begin by drawing lines, bisecting angles, and reproducing segments. Later they do sophisticated constructions involving over a dozen steps. When they finish, students will have been introduced to 134 geometric terms and will be ready to tackle formal proofs.

Includes:

• Key to Geometry Book 1: Lines and Segments
• Key to Geometry Book 2: Circles
• Key to Geometry Book 3: Constructions
• Key to Geometry Book 4: Perpendiculars
• Key to Geometry Book 5: Squares and Rectangles
• Key to Geometry Book 6: Angles
• Key to Geometry Book 7: Perpendiculars and Parallels, Chords and Tangents, Circles
• Key to Geometry Book 8: Triangles, Parallel Lines, Similar Polygons