Higbee, F. G · New York, John Wiley & Sons · leaf 103
rojection. As a rule the problem may be solved morereadily by finding a base in H or V. Note. A section is the intersection obtained by cutting asurface by a plane. If the plane of the section is perpendicularto the axis of the surface the section is called a right sections-other sections are, in… … Fig. 74. Discussion. Since the right section lies in a plane perpendicu-lar to the axis the edges of the surface will be perpendicular tothis plane. If, then, through the corners of the given right sec-tion lines be drawn perpendicular to the plane of this sectionthese lines will be the edges of…
Geometry, Descriptive
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