 | John Dougall - 1810 - 734 pages
...than four sides are distinguished by various names, descriptive of their number of sides : thus, one of five sides is called a pentagon ; one of six sides, a hexagon ; one of seven sides, a heptagon ; one of eight sides, an octagon; one of nine sides, a nonagon; on? of ten... | |
 | John Dougall - Encyclopedias and dictionaries - 1815 - 514 pages
...angles, which are always of the same number with the sides ; thus a figure of five sides or angles, is called a pentagon, one of six sides a hexagon, one of seven sides a heptagon, one of eight sides an octagon, one of nine sides an enneagon, or more commonly... | |
 | Edward Riddle - Nautical astronomy - 1824 - 572 pages
...quadrilateral. 38. Plane figures of more than four sides receive the general denomination of Polygons. 39. A Polygon of five sides is called a Pentagon ; one of six sides, a Hexagon ; one of seven sides a Heptagon ; one of eight sides an Octagon, &c. 40. A Regular Polygon is one which has... | |
 | Alexander Ingram - Mathematics - 1830 - 458 pages
...figure, as MP. 38. A POLYGON is a figure contained by more than four straight lines, as ABODE. 39. A POLYGON of five sides is called a Pentagon ; one of six sides, a Hexagon ; of seven sides, a Heptagon; of eight sides, an Octagon; of nine sides, a Nonagon ; of ten sides,... | |
 | Alexander Ingram - 1851 - 202 pages
...figure, as MP. 38. A POLYGON is a figure contained by B more than four straight lines, as ABODE. D 39. A POLYGON of five sides is called a Pentagon ; one of six sides, a Hexagon; of seven sides, a Heptagon; of eight sides, an Octagon; of nine sides, a Nonagon; of ten sides, a Decagon,... | |
 | Evan Wilhelm Evans - Geometry - 1862 - 116 pages
...the perpendicular is the longest (Theo. XIX). Sit. VII.— OF POLYGONS IN GENERAL. DEFINITIONS. 1. A polygon of five sides is called a PENTAGON; one of six sides, a HEXAGON ; of seven sides, a HEPTAGON ; of eight sides, an OCTAGON ; of ten sides, a DECAGON ; of twelve sides,... | |
 | Lorenzo Fairbanks - 1875 - 472 pages
...Pentagon ; one of six sides, a Hexagon ; one of seven sides, a Heptagon , one of eight sides, an Octagon ; one of nine sides, a Nonagon ; one of ten sides, a Decagon, etc. 702. A Bight-angled Triangle is a triangle which has one right angle. The side opposite the right-angle... | |
 | Edward Albert Bowser - Geometry - 1890 - 418 pages
...pentagon; one of six sides, a hexagon; one of seven sides, a heptagon; one of eight sides, an octagon; one of nine sides, a nonagon; one of ten sides, a decagon; one of twelve sides, a dodecagon; one of fifteen sides, a quindecagon. 140. An equilateral polygon is one... | |
 | George Irving Hopkins - Geometry, Plane - 1891 - 208 pages
...also called a trigon. A polygon of four sides is usually termed what ? It is also called a tetragon. A polygon of five sides is called a pentagon, one of six sides a hexagon, one of seven sides a heptagon, one of eight sides an octagon, one of nine sides a nonagon or enneagon, one... | |
 | John Macnie - Geometry - 1895 - 390 pages
...that shall be to a given square as 7 is to 5. BOOK VI. REGULAR PLANE FIGURES. REGULAR POLYGONS. 369. A polygon of five sides is called a pentagon ; one of six sides is called a hexagon; of seven sides, a heptagon; of eight sides, an octagon; of fifteen sides, a pentadecagon... | |
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A polygon of five sides is called a pentagon ; one of six sides, a hexagon ; one of seven sides, a heptagon, Pentagon. 
