Davies, Charles, 1798-1876 · New York and Chicago, A. S. Barnes and company · leaf 14
fin it io ns. OF PLANE FIGURES. 35. A Plane Figure is a portion of a plane terminated on allsides by lines, either straight or curved. 36. If the lines which bound a figure are straight, the spacewliich they inclose is called a rectilineal figure, oi polygonThe lines themselves, taken together, are… … 39. A polygon of five sides is called apentagon.
Geometry · Plane trigonometry
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