Illustration of the intersection of a triangular pyramid and a plane.
Ervin Kenison, S. B. and Edward B. Waite, S. B. Mechanical Drawing (Chicago: American School Of Correspondence, 1917) Part III: Page 98
1038×2400, 194.3 KiB
442×1024, 34.4 KiB
276×640, 19.3 KiB
138×320, 8.3 KiB