Hart, C. A. (Clara Avis), b. 1863, Feldman, Daniel D., b. 1872 · New York, American Book Co · leaf 257
s series can be constructed. Gauss proved, moreover, that only a limited class of regular polygons areconstructible by elementary geometry. For a note on the life of Gauss,see § 520. 245 246 PLANE GEOMETRY Proposition I. Theorem 517. If tl%e circumference of a circle is divided intoany niimher of… … Given circumference ACE divided into equal arcs AB, BC, CD.etc., and let chords AB, BC, CD, etc., join the several points ofdivision, and let the tangents GH, HE, EL, etc., touch the circum-ference at the several points of division. To prove A BCD • • • and GHEL • • • regular polygons. 1.2.3.4.5.…
Geometry, Plane · Geometry, Solid
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