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In proposition 26 of Euclid's Elements, we will prove two different cases. First, we prove that if two triangles share a corresponding angle, side, and angle, then the triangles must be congruent.
Second, we prove that if two triangles share a corresponding side, angle, and angle then the triangles must also be congruent.
Playlist of Euclid's Elements in link below:
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Find more lesson plans like this:30-60-90 Triangle: Theorem, Properties & Formula
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