Key to Geometry – Books 1 thru 8
From their website:
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.
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