 A pentagon is a polygon of five sides ; a hexagon, of six sides ; a heptagon, of seven ; an octagon, of eight ; a nonagon, of nine ; a decagon, of ten ; an undecagon, of eleven ; and a dodecagon, of twelve sides.  Mensuration for pupil teachers - Page 5by James Elliot - 1879 - 106 pagesFull view - About this book
 | Anthony Nesbit - Surveying - 1824 - 476 pages
...pentagon is a polygon of five sides ; a hexagon of six ; a heptagon of seven ; an octagon of eight ; a nonagon of nine ; a decagon of ten ; an undecagon of eleven ; and a duodecagon of twelve. 37. A regular polygon has all its sides and angles equal ; when they are unequal,... | |
 | E. S. Norman Campbell - English language - 1830 - 304 pages
...a Pentagon is a Polygon of five sides', a Hexagon of six, a Heptagon of seven, an Octagon of eight, a Nonagon of nine, a Decagon of ten, an Undecagon of eleven, and a Dodecagon of twelve sides. All Fortifications are built upon a Polygon, either regular or irregular. PONIARD. A small pointed... | |
 | Thomas Holliday - Surveying - 1838 - 404 pages
...A pentagon is a polygon of five sides, a hexagon of six, a heptagon of seven, an octagon of eight, a nonagon of nine, a decagon of ten, an undecagon of eleven, and a duodecagon of twelve sides. 2. The side of a regular hexagon inscribed in a circle is equal to the... | |
 | Benjamin Greenleaf - Arithmetic - 1839 - 356 pages
...is a polygon of five sides ; a hexagon, of six sides ; a heptagon, of seven ; an octagon, of eight ; a nonagon, of nine ; a decagon, of ten ; an undecagon, of eleven ; and a dodecagon, of twelve sides. 41. A regular polygon has all its sides and all its angles equal. If they are not both equal,... | |
 | Benjamin Greenleaf - Arithmetic - 1841 - 334 pages
...is a polygon of five sides ; a hexagon, of six sides ; a heptagon, of seven ; an octagon, of eight ; a nonagon, of nine ; a decagon, of ten ; an undecagon, of eleven ; and a dodecagon, of twelve sides. 41. A regular polygon has all its sides and all its angles equal. If they are not both equal,... | |
 | Benjamin Greenleaf - Arithmetic - 1843 - 340 pages
...is a polygon of five sides ; a hexagon, of six sides ; a heptagon, of seven ; an octagon, of eight ; a nonagon, of nine ; a decagon, of ten ; an undecagon, of eleven ; and a dpdecagon, of twelve sides. 41. A regular polygon has all its sides and all its angles equal. If they... | |
 | Anthony Nesbit - Plane trigonometry - 1847 - 492 pages
...36. A pentagon is a polygon of five ; a hexagon of six ; a heptagon of seven ; an octagon of eight ; a nonagon of nine ; a decagon of ten ; an undecagon of eleven ; and a duodecagon of twelve sides. 37. A regular polygon has all its sides and angles equal, they are unequal,... | |
 | James Wharton - 1847 - 224 pages
...pentagon is a polygon of five sides ; a hexagon of six ; a heptagon of seven ; an octagon of eight ; a nonagon of nine ; a decagon of ten ; an undecagon of eleven ; and a duodecagon of twelve sides. 34. A regular polygon has all its sides and angles equal. 35. A circle... | |
 | Benjamin Greenleaf - Arithmetic - 1850 - 368 pages
...is a polygon of five sides; a hexagon, of six sides ; a heptagon, of seven ; an octagon, of eight; a nonagon, of nine ; a decagon, of ten ; an undecagon, of eleven; and a dodecagon, of twelve sides. 43. Any figure is equilateral when all its sides are equal; and it is equiangular when all its... | |
 | James Elliot - 1851 - 152 pages
...Pentagon is a polygon of five sides; a Hexagon, of six; a Heptagon, of seven; an Octagon, of eight r (as Q); a Nonagon, of nine; a Decagon, of ten; an...angles are unequal, it is said to be Irregular, as P. 54. A Rectilineal Figure is that which is bounded by straight lines; and a Curvilineal Figure, by curved... | |
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