28. Sea el triángulo isósceles ABC de base BC. Se prolonga BA hasta un punto E tal que B-A-E, y se prolonga CA hasta F tal que C-A-F, de modo que AE = AF. Se traza AH perpendicular a BC. Demostrar que el ángulo AHF es congruente con el ángulo AHE.

Ejercicio resuelto 28 | Triángulos | Geometría Euclidiana.pdf

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