Higbee, F. G · New York, John Wiley & Sons · leaf 58
Fig. 43. 48 ESSENTIALS OF DESCRIPTIVE GEOMETRY of the revolved position of N. BN may now be revolved to thefirst position bn, and n will be shown at n. The elevation ofthe hopper may now be drawn as shown by the figure. 39. Special Cases, i. To find the length of a hne which liesin the first and…
Geometry, Descriptive
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