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Pythagoras Theorem explained
This video explains about Pythagoras Theorem with the help of an activity.
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]
Khan Academy
Khan Academy: Triangles: Wrong Statements in Proofs Example 1
A video analyzing how to recognize wrong statements in a proof. [2:48]