Uploaded March 2026 | Updated September 2026, 3 weeks ago

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In this math video I (Susanne) explain how to solve a geometry problem step by step using triangle congruence and algebraic reasoning. We begin by carefully analyzing the diagram and identifying key geometric relationships. By proving that two triangles are congruent, we unlock equal side lengths. Using these congruence results, we then set up an equation and solve it to determine the missing length. Mathematics explained.

00:00 Intro – Geometry Puzzle
0:31 How to solve it
2:59 Congruence of Triangles
7:15 Set up an equation
8:32 See you later!

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