What is the HL Theorem - Congruent Triangles

The video tutorial covers the process of writing geometric proofs, focusing on angle relationships and congruency. It explains the limitations of using the side-side-angle method for proving congruency, demonstrating how rotation can create non-congruent triangles with the same measurements. The tutorial introduces the Hypotenuse-Leg (HL) theorem as a valid method for proving congruency in right triangles, emphasizing the importance of identifying a right angle to apply this theorem.

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