Kenison, Ervin, Bradley, Harry Cyrus, 1871-1936 · New York : The Macmillan Company · leaf 176
ne that is perpendicular to both of them. This line,the common perpendicular, measures the shortest distance be-tween the two given lines. Problem 26. To find the shortest distance between two lines notin the same plane, and the projections of their common perpendicular. Analysis (Fig. 236). Let A… … Fig. 236. this distance is equal to the shortest distance between Band A. Assume any point, e, in B; from e drop a perpen-dicular to the plane Q, intersecting Q at the point k. Notethat although this lirst perpendicular ek is not in the requiredposition, it does have the required direction. Now let…
Geometry, Descriptive
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