radial surfaces Author: Andalucia 2008-June PAU
Course: 2 Bachillerato
Level: Very difficult
File: Selectivity 2008 / Exercise 5.1
S e is a peculiar way of asking for a prism which is widely used in the selectivity of Andalusia. In this case bases and cross-shaped presents sitting on their sides. The projections of the figure are given and calls its intersection with an oblique plane and the true magnitude.
applied to solve plane change for the court is seen projecting. Of the two options are advised to keep the projection of the plane of the figure (the horizontal in this case). After obtaining the new projections of the prism is determined by the intersection projection and finally lowers the plane (the oblique, or projecting) to determine the true extent of the section.
The difficulty lies mainly in the time needed to solve it and little space to draw auxiliary views.
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