| Charles Davies, Adrien Marie Legendre - Geometry - 1885 - 538 pages
...angles of the polygon. 19. Polygons are classified according to the number of their sides or angles. A Polygon of three sides is called a triangle ; one...heptagon; one of eight sides, an octagon ; one of ten sides, a decagon ; one of twelve sides, a dodecagon, &c. 20. An EQUILATERAL POLYGON is one whose... | |
| George Albert Wentworth - Geometry - 1888 - 272 pages
...coincide. 204. A polygon of three sides is called a trigon or triangle; one of four sides, a tetragon or quadrilateral; one of five sides, a pentagon ; one...a heptagon; one of eight sides, an octagon; one of ten sides, a decagon ; one of twelve sides, a dodecagon. PLANK GEOMETRY. BOOK I. PROPOSITION XLIII.... | |
| George Albert Wentworth - Geometry, Analytic - 1889 - 264 pages
...called a trigon or triangle; one of four sides, a tetragon or quadrilateral ; one of five sides, & pentagon; one of six sides, a hexagon; one of seven...a heptagon; one of eight sides, an octagon; one of ten sides, a decagon ; one of twelve sides, a dodecagon, PLANE GEOMETRY. — BOOK I. PROPOSITION XLIV.... | |
| Edward Albert Bowser - Geometry - 1890 - 418 pages
...AD. 139. Polygons are named from the number of their sides, as follows : A polygon of three sides is_ a triangle; one of four sides, a quadrilateral; one...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.... | |
| Edward Albert Bowser - Geometry - 1891 - 424 pages
...139. Polygons are named from the number of their sides, as •follows: A polygon of three sides is a triangle; one of four sides, a quadrilateral; one...one of six sides, a hexagon; one of seven sides, a hcptagon; one of eight sides, an octagon; one of nine sides, a nonagon; one of ten sides, a decagon;... | |
| George Irving Hopkins - Geometry, Plane - 1891 - 204 pages
...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...heptagon, one of eight sides an octagon, one of nine sides a nonagon or enneagon, one of ten sides a decagon, one of eleven sides an undecagon, one of twelve... | |
| George Irving Hopkins - 1891 - 210 pages
...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, on e of eight sides an octagon, one of nine sides a nonagon or enneagon, one of ten sides a decagon,... | |
| George Washington Hull - Arithmetic - 1895 - 408 pages
...curved. A Polygon is a plane figure bounded by straight lines. Triangle. BD Quadrilateral. Pentagon. 241. A Polygon of three sides is called a Triangle ; one...five sides, a Pentagon; one of six sides, a Hexagon, etc. The lines AB, BC, CA; DE, EF, FG, GD; and HI, IJ, JK, KL, LH, of the above polygons are called... | |
| Wooster Woodruff Beman, David Eugene Smith - Geometry - 1895 - 346 pages
...equiangular to the other, when the angles of the one are respectively equal to the angles of the other. A polygon of three sides is called a triangle ; one of four sides, a quadrilateral. Other special kinds of polygons are mentioned after th. 20. Any side of a polygon may be called its... | |
| Electrical engineering - 1897 - 672 pages
...AB CD EA is the perimeter. 698. Polygons are classified according to the number of their sides: One of three. sides is called a triangle ; one of four...heptagon ; one of eight sides, an octagon ; one of ten sides, a decagon ; one of twelve sides, a dodecagon, etc. 699. Equilateral polygons are ur those... | |
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