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Problems op Position
Problems op Magnitude
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affinity and reflection Analytic Solution.—Let Analytic Solution.—Substituting auxiliary plane auxiliary view co-line co-point common line common perpendicular common point cone Descriptive Geometry DETERMINE THE ANGLE dihedral direction cosines drawing equation 12 Example.—Given expressed analytically given plane given point Graphic Solution Graphic Solution.—Method ground line H plane H projection H trace hence horizontal plane horizontal trace illustrated in Fig incident plane line of section line q line segment normal oblique obtained orthogonal projection parallel lines parallelopiped pendicular piercing point plane figure plane of affinity plane of projection plane of reference plane of reflection plane parallel plane perpendicular point parallel point Q points common points of affinity problem profile plane rebating reference axes reference planes required angle required distance required plane respectively revolved position sin2 solved Supplementary Views surface three planes three points trihedral angles true shape vertical plane x-axis z-axis