Similarity And Congruence

Define what it means for polygons to be "similar"or "congruent"by thinking about photocopies. Then use that to prove the... (more)

Define what it means for polygons to be "similar"or "congruent"by thinking about photocopies. Then use that to prove the third key assumption of geometry—the side-angle-side postulate—which lets you verify when triangles are similar. Thales of Ionia used this principle in 600 B.C.E. to impress the Egyptians by calculating the height of the pyramids. (less)