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Prove: Angle Bisector Theorem — a geometric diagram demonstrating the relationship between the sides of a triangle divided by an angle bisector.

Triangle diagram illustrating the Angle Bisector Theorem, showing sides labeled a, b, x, and y, with the equation a/b = x/y.

Triangle diagram illustrating the Angle Bisector Theorem, showing sides labeled a, b, x, and y, with the equation a/b = x/y.

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