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Transcript
Triangle Angle Sum Theorem: For a triangle, the interior angle sum = 180 2 corollaries to the Triangle angle sum thm: (little theorems that easily follow from a theorem) The acute angles of a right triangle are complementary The angles of an equiangular triangle are all 60 3rd Angle Theorem: If two angles of one triangle are congruent to two angles of another triangle, then the 3rd angles are congruent. Exterior Angle Theorem: In a triangle, an exterior angle is equal to the sum of the two remote interior angles. Definition of congruent triangles Two triangles are congruent i.f.f. all six corresponding sides and angles are congruent 1
