Prove theorems about triangles. Theorems include: a line parallel to one side of a triangle divides the other two proportionally and conversely; the Pythagorean Theorem proved using triangle similarity.
Khan Academy ResourcesTriangle congruence reviewProve theorems using similarityJustify triangle congruencePythagorean theorem proof using similarityIntro to angle bisector theoremProving the SAS triangle congruence criterion using transformationsProof: Parallel lines divide triangle sides proportionallyProving the SSS triangle congruence criterion using transformationsProving the ASA and AAS triangle congruence criteria using transformations
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