Key to Geometry Book 8

by Newton Hawley and Patrick Suppes

Ease Your Students Into Geometry Key to Geometry offers a non-intimidating way to prepare students for formal geometry as they do step-by-step constructions.

Students begin by drawing lines, bisecting angles, and reproducing segments using only a pencil, compass, and straightedge.
Later they do sophisticated constructions involving more than a dozen steps and are prompted to form their own generalizations.
When they finish, students have been introduced to 134 geometric terms and are ready to tackle formal proofs.