Sophia Learning
Sophia: Triangle Congruence Theorem (Hl): Lesson 1
This lesson will present the Hypotenuse-Leg Triangle Congruence Theorem. It is 1 of 5 in the series titled "Triangle Congruence Theorem (HL)." [5:01]
Khan Academy
Khan Academy: Triangles: Fill in the Blank Triangle Proofs Example 1
In this video, we listen to how a geometry exercise is completed as the presenter demonstrates the reasoning behind proving that the corresponding parts of triangles are congruent. [9:42]