The Three Squares Puzzle

Another one of Maurice’s Favourite Puzzles

Using Geometry Only. The diagram shows three squares and three lines from the bottom left of each square to the top right of the last square. The angles are labelled, A, B and C. Using only elementary geometry (no trigonometry) show that the angle C is equal to angle A plus angle B; that is A+B=C

Fins the answer on this YouTube video

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