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" 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. "
A Course of Mathematics: For the Use of Academies, as Well as Private ... - Page 278
by Charles Hutton - 1822
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A Treatise on Mensuration, Both in Theory and Practice

Charles Hutton - Measurement - 1788 - 728 pages
...ten; an undecagon, eleven ; and a dodecagon has twelve fides. 42. A regular polygon has all its fides and all its angles equal. — If they are not both...polygon is irregular. 43. An equilateral triangle is alfo a regular figure of three fides, and the fquare is one of four : the former being alfo called...
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Mathematics: Compiled from the Best Authors and Intended to be the ..., Volume 1

Mathematics - 1801 - 446 pages
...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 angles equal. — If they be not both equal, the polygon is irregular. 43. An equilateral triangle is also a regular figure of...
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Mathematics: Compiled from the Best Authors, and Intended to be ..., Volume 1

Samuel Webber - Mathematics - 1808 - 466 pages
...dodecagon, twelve. 42. A regular polygon has all its sides and all its angles equal. — If they be not both equal, the polygon is irregular. 43. An equilateral...square is one of four ; the former being also called a trigtm, and the latter a tetragon. Pentagon. Hexagon. Heptagon. Octagon. Nonagon. Decagon, Undecagon....
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The principles of architecture, Volume 1

Peter Nicholson - 1809 - 426 pages
...polygon hath all its sides and angles equal ; and if they are not equal, the polygon is irregular. 41. An equilateral triangle is also a regular figure of three sides, and a. square is one of four; the former being called a trigon, and the latter a tetragon. 42. A circle...
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A Course of Mathematics: In Two Volumes : for the Use of Academies ..., Volume 1

Charles Hutton - Mathematics - 1816 - 610 pages
...eight ; a Nonagoii, niiie ; a Decagon, ten ; an Undecagon, eleven ; and a Dodecagon, twelve sides. 42. A Regular Polygon has all its sides and all its...equal. — If they are not both equal, the polygon is Irregultr. 43. An Equilateral Triangle is also a Regular Figure of three sides, und the Square is one...
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A Course of Mathematics: In Two Volumes. For the Use of Academies ..., Volume 1

Charles Hutton - Arithmetic - 1818 - 646 pages
...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 all its angles equal. — lf they are not both equal, the polygon is lrregular. 43. An Equilateral Triangle i' also a Regular...
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A Course of Mathematics for the Use of Academies: As Well as ..., Volume 1

Charles Hutton - Mathematics - 1825 - 608 pages
...Undecagon, eleven ; and a Dodecagon, twelve sides. 42. A 42. A Regular Polygon has all its sides ami all its angles equal. — If they are not both equal, the polygon is irregular. 43. Aa Equilateral Triangle is nlso a Kegular Figure of three sides, and the Square is one of four, the...
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A London Encyclopaedia, Or Universal Dictionary of Science, Art ..., Volume 10

Thomas Curtis - Aeronautics - 1829 - 814 pages
...OCTAI- ON eight, a NON AGON nine, a DECAGON ten» an UNDECACON eleven, and a DODECAGON twelve sides. 29. A REGULAR POLYGON has all its sides and all its angles equal ; if they are not equal, the polygon is IRREGULAR. 30. Л CIRCLE it a plane figure bounded by one line called the circumference,...
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The London encyclopaedia, or, Universal dictionary of science ..., Volume 10

Thomas Curtis (of Grove house sch, Islington) - 798 pages
...a NON AGON nine, a Drr AGON ten, an l:NntCAGON eleven, and a DODECAGON twelve sides. 29. A REGULAE POLYGON has all its sides and all its angles equal ; if they are not equal, the polygon is IRREGULAR. 30. A CIRC LI is a plane figure bounded by one 1 2 line called the...
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A Course of Mathematics: For the Use of Academies as Well as ..., Volume 1

Charles Hutton - Mathematics - 1831 - 660 pages
...; a Non. agon, nine ; a Decagon, ten ; an Undecagoo, eleven ; Dodecagon, twelve aides. о CCOMETKY. 42. A Regular Polygon has all its sides and all its...former being also called a Trigon, and the latter 4*etragon. 44. Any figure is equilateral, when all its sides are equal : and it is equiangular when...
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