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Engineers' and mechanics' pocket-book .. (1881)

Haswell, Charles Haynes, 1809- [from old catalog] · New York, Harper & brothers · leaf 171

An illustration from Engineers' and mechanics' pocket-book .., 1881, leaf 171
Note.—Any other polygon may be made in a similarmanner by drawing tangents to the points, first definingthem in the circle. 166 GEOMETRY. To Inscribe a Pentagon in a Gfiven Circle—Fig. 3.(3.) A Draw the diameters, A p and m n, at right angles to each other: bisect o n in r, and with r A describe… … To Describe a Pentagon upon a Griven Line—Fig. 4.(4.) C Draw B m perpendicular to A B, and equal to one halfof it; extend A m until m n is equal to B m.

Engineering · Mechanical engineering

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