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 91
from XY. 4. Find the shadow of a sphere of 2 diameter, having its centre 2 above the H.P. and 2in front of the \.P., when the rays of parallel light are inclined at 45° to the H.P. and 30° tothe V.P. N.B.—The shadow problem here given involves the method discussed in this section. PART THREE… … Fig. 85. of one or of the other, will touch it along a straight hne, and, in the case of thecone, will include its apex. Such a tangent plane may be shown, as usually planesare shown, by its traces, and its traces will be tangential to the curved traces ofthe curved surface of the solid. In the…
Geometry, Descriptive
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