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Geometry Unit 4 Congruent Triangles Unit Unit 4 IV Classification of Triangles • Angles – – – – • Acute triangle Right triangle Obtuse triangle Equiangular triangle Congruent Sides – – – Scalene triangle Isosceles triangle Equilateral triangle Unit Unit 4 IV Exterior Angles 2 1 3 4 m4 m1 m2 Exterior Angle: 4 Remote Interior Angles: 1 and 2 Unit Unit 4 IV Triangle Congruence Postulates SSS ASA SAS Unit Unit 4 IV Triangle Congruence Theorems AAS HA HL Unit Unit 4 IV Triangle Congruence Theorems LA LL Unit Unit 4 IV Flow Chart Proof 1 Statement Reason 2 3 4 Statement Reason 5 Statement Reason Statement Reason Statement Reason Unit Unit 4 IV