Hinge theorem
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The Hînge theorem in geometry states that if two sides of one triangle are congruent to two sides of another triangle, and the included angle of the first is larger than the included angle of the second, then the third side of the first is longer than the third side of the second.
The converse of the hinge theorem would be "If the third side of the first triangle is greater than the third side of the second triangle then the included angle of the 1st triangle is larger than the included angle of the 2nd triangle. ((maths-stub))