Mechanical drawing : a manual for teachers and students (1902)
Cross, Anson Kent · Boston : Ginn & Co. · leaf 30
t off the radius of the semi-circlein J and 4. Draw A 3 and A 4 to intersect,in 5 and 6, the perpendicular erected at B. Problem 34. — To circumscribe an equi-lateral triangle about a given circle C. Draw a diameter, 1-2, of the circle. With2 as centre and 2-j, -tbe radius of C asradius, describe a… … Problem 35. — To circumscribe a squareabout a given circle. Draw the diameter 1-2, and a diameter3-4^ at right angles to 1-2. With z, 2, j,and 4 as centres and radius J~5, describearcs which intersect at 6, 7, 8^ and g. Joing-6, 6-y, y-8, and 8-g. Problem 36. — To circumscribe a regular hexagon…
Mechanical drawing
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![An illustration from Vnderweysung der Messung : mit dem Zirkel vn[d] Richtscheyt in Linien, Ebnen vnnd gantzen Corporen (1525)](https://img.insideoutlibrary.com/img/200/ia-vnderweysungderm00drer-116-229.webp)
