Machinists' and draftsmen's handbook, containing tables, rules and formulas, with numerous examples explaining the principles of mathematics and mechanics as applied to the mechanical trades; intended as a reference book for all interested in mechanical work (1910)
Lobben, Peder, 1858- · New York, D. Van Nostrand company · leaf 171
on. an octagon. a nonagon. a decagon. ; an undecagon. twelve a dodecagon. The sum of the degrees of all the angles of any polygoncan always be found by subtracting 2 from the number of sidesand multiplying the remainder by 180. For instance : The sum of degrees in any quadrangle is always (4 — 2)X… … I 5 2 GEOMETRY. Circles. F15 12J/ The Circle is a plane figure bound- ed by a curved line called the circum-ference or perphery, which is at allpoints the same distance from a fixedpoint in the plane, and this point iscalled the center of the circle. (Seepoint c, Fig. 12). A Dia?neter is a straight…
Mechanical engineering
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