Haswell, Charles Haynes, 1809- [from old catalog] · New York, Harper & brothers · leaf 172
0. From any point A, with A o equal to the radius of the circle, describe e o e; frome and e describe er, e r; join A ?\ r r, and r A, and the triangle is formed. Note—All figures of 10 or 20 sides are readily determined from the side of a pen-tagon, beinghalved or quartered; and in like manner,… … Let the longest diameter given be equal to a 5, and the shortest to c o.Bisect f i qually at right angles in s. Ma*V — tal to co; divide rft into three equal parts, set off two of thope parts s -- d from s to u; then, with the distance ui\ make the two equilateral tit- 168 GEOMETRY. angles ucr and…
Engineering · Mechanical engineering
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