Como has comprobado, construir recta paralela o perpendicular a una recta dado es un punto usando el compás es un procedimiento algo lento, [br]Utiliza ahora las herramientas [img]data:image/png;base64,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[/img]"Recta Paralela" y [img]data:image/png;base64,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[/img]"Recta perpendicular" para determinar dichas rectas por el punto P.[br]Es suficiente seleccionar la herramienta y seleccionar la recta y el punto P.