 | Mathematics - 1801 - 446 pages
...number of their sides or angles. 41. A pentagon is a polygon of five sides ; a txteagen has six sides ; a heptagon, seven ; an octagon, eight ; a nonagon, nine ; a decagon, ten ; an widecagon, eleven ; and a dodecagon, twelve. 42. A regular polygon has all its sides and all its... | |
 | Peter Nicholson - 1809 - 426 pages
...number of their sides or angles. SQ. A pentagon is a polygon of five sides, a hexagon hath six aides, a heptagon seven, an octagon eight, a nonagon nine, a decagon ten, an undecagon eleven, and a dodecagon twelve sides. 40. A regular polygon hath all its sides and angles... | |
 | Thomas Keith - 1817 - 306 pages
...the number of their sides. Thus, a Pentagon, is a polygon of five sides; a Hexagon, has six sides; a Heptagon, seven; an Octagon, eight; a Nonagon, nine; a Decagon, ten; an Undecagun, eleven; and a Duodecasron, has twelve sides. If all the sides and angles are equal, they... | |
 | Charles Hutton - Arithmetic - 1818 - 646 pages
...their sides or angles, Thus, 41. A Pentagon is a polygon of five sides : a Hexagon, of six sides ; a Heptagon, seven ; an Octagon, eight ; a Nonagon, nine; a Decagon, ten ; an Undecagon, eleven ; and a Dodecagon, twelve sides. 42. A Regular Polygon has all its sides and... | |
 | Charles Hutton - Mathematics - 1822 - 616 pages
...their sides or angles, Thus, 41. A Pentagon is a polygon of five sides ; a Hexagon, of six sides ; a Heptagon, seven; an Octagon, eight; a Nonagon, nine ; a Decagon, ten ; an Undecagon, eleven ; and 4 Dodecagon, twelve sides. o 27S 42. A Regular Polygon has all its sides... | |
 | Arthur Parsey - Miniature painting - 1831 - 242 pages
...and four angles. (Plate 3, fig. 15.) A pentagon is a polygon of five sides; a hexagon hath six sides; a heptagon seven ; an octagon eight; a nonagon nine; a decagon ten, &c. &c. These various superficies are called regular when all the sides are equal, and irregular figures... | |
 | Edward Shaw - Architecture - 1832 - 402 pages
...number of their sides or angles. 39. A pentagon is a polygon of five sides, a hexagon has six sides, a heptagon seven, an octagon eight, a nonagon nine, a decagon ten, an undecagon eleven, and a dodecagon twelve sides. 40. A regular polygon has all its sides and angles... | |
 | William Grier - Mechanical engineering - 1832 - 366 pages
...of their sides or angles. Thus, 41. A Pentagon is a polygon of five sides ; a Hexagon, of six sides; a Heptagon, seven; an Octagon, eight; a Nonagon, nine ; a Decagon, ten ; an Undecagon, eleven ; and a Dodecagon, twelve sides. 42. A Regular Polygon has all its sides and... | |
 | Ireland commissioners of nat. educ - 1834 - 370 pages
...names fi-om the number of their sides. Thus, a Pentagon has five sides ; a Hexagon, has six sides ; a Heptagon, seven ; an Octagon, eight ; a Nonagon, nine ; a Decagon, ten ; an Undecayon, eleven ; and a Duodecagon, has twelve sides. If all the sides of each figure be equal,... | |
 | Industrial arts - 1835 - 398 pages
...their sides or an. gles. Thus — 41. A Pentagon is a polygon of five sides ; a Hexagon, of six sides ; a Heptagon, seven ; an Octagon, eight ; a Nonagon, nine ; a Decagon, ten ; an Undecagon, eleven ; and a Dodecagon, twelve sides. 42. A Regular Polygon has all its sides and... | |
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Hexagon, of six sides; a Heptagon, seven; an Octagon, eight; a Nonagon, nine ; a Decagon, ten ; an Undecagon, eleven ; and a Dodecagon, twelve sides. 
