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 108
8 be an inclined line, such as that referred to above, andcc the centre of a sphere whose projections are given. Let it be required to find TANGENT PLANES COMMON TO THREE OIVEN SPHERES 99 the tangent planes to this sphere, which contain the Hne AB. The order ofprocedure might be as follows:—(i)… … Fig. 98. help of a plane LMX, containing the line -1^, and intersecting plane RST, findthe point of intersection which AB makes with RST at />/>. (4) Rabatte the pointP about 5rto p2, and also rabatte the centre C to C2, and draw the rabatted greatcircle of the sphere made by the intersection…
Geometry, Descriptive
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