Lange, David C. (David Christoph) · New York : John Wiley & Sons ; London : Chapman & Hall · leaf 36
is plane is the required plane.(Art. 31.) 34. To pass a plane through a given line, perpendicularto a given plane. Let A be the given line and P the given plane. (Fig. 47.)The required plane Q, contains two intersecting lines,namely, the given line, and an intersecting line B, per-pendicular to the… … 26 PRINCIPLES OF DESCRIPTIVE GEOMETRY <p is the required angle which can beseen in its true size by revolving itand the plane Q containing it aboutits traces into either coordinate.
Shades and shadows · Geometry, Descriptive
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