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This is the correction of a complete Baccalaureate exam where the topics of Dihedral Intersection System, Parallelism and Perpendicularity are included, with a certain complexity for some of the students. These informative videos allow me to save class time and at the same time provide students with a way of knowing what they should have done to obtain the highest grade. In this way, I can dedicate class time to advancing in the syllabus and solving doubts that you have about the exercises.