G.6.D
Verify theorems about the relationships in triangles, including proof of the Pythagorean Theorem, the sum of interior angles, base angles of isosceles triangles, midsegments, and medians, and apply these relationships to solve problems.
Khan Academy ResourcesProve triangle propertiesGeometry proof problem: congruent segmentsProofs concerning isosceles trianglesFinding angles in isosceles triangles (example 2)Finding angles in isosceles trianglesProofs concerning equilateral trianglesSpecial right triangles proof (part 2)Special right triangles proof (part 1)Exploring medial trianglesProving triangle medians intersect at a point

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