Descriptive geometry for students in engineering science and architecture; a carefully graded course of instruction (1915)
Armstrong, Henry F. (Henry Fry), 1868- · New York, J. Wiley & sons, inc.; [etc., etc.] · leaf 53
he line AB is evidently inclined to the plane RST. If aperpendicular to the plane RST be drawn from A by making its elevation per-pendicular to RS and its plan perpendicular to ST, there will be contained by 44 DESCRIPTIVE GEOMETRY these two lines, AB and AC, an angle which is the complement of the… … Fig. 48. EXERCISE XVIII Find the inclination to the given oblique plane, of the line AB in each of the cases showna.t A, B and C.
Geometry, Descriptive
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