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 Βιβλία Βιβλία Definitions. Polygons are classed according to the number of their sides: A triangle is a polygon of three sides. A quadrilateral is a polygon of four sides. A pentagon has five sides ; a hexagon, six ; a heptagon, seven ; an octagon, eight ; an enneagon,... Graded Work in Arithmetic - Σελίδα 47
των Samuel Wesley Baird - 1901
Πλήρης προβολή - Σχετικά με αυτό το βιβλίο ## Engineers' and Mechanics' Pocket-book ...

Charles Haynes Haswell - 1851 - 286 σελίδες
...and angles are equal or unequal, and they an named from the number of their sides or angles. Thus : A Pentagon has five sides. A Hexagon " six " • A Heptagon " seven " An Octagon . " eight " , ..... A Nonagon " nine " . " '• A Decagon * ten " An Undecagon " eleven " . . A Dodecagon " twelve... ## ENGINEERS AND MECHANICS POCKET BOOK

CHAS. H. HASWELL - 1853
...and angles are equal or unequal, and they ai« named from the number of their sides or angles. Thus : A Pentagon has five sides. A Hexagon " six " A Heptagon " seven " An Octagon " eight " A Nonagon " nine " A Decagon " ten " An Undecagou " eleven " A Dodecagon " twelve " A CIRCLE is a... ## The Computist's Manual of Facts: And Merchant's and Mechanic's Calculator ...

Ezra S. Winslow - 1853 - 252 σελίδες
...sides. A Regular Polygon has all its sides equal. An Irregular Polygon has not all its sides equal. A Pentagon has five sides ; a hexagon, six ; a heptagon, seven ; an octagon, eight ; a nonagon, nine ; a decagon, ten ; an undecagon, eleven ; a dodecagon, twelve. The Perimeter of a... ## A course of geometrical drawing

William Schofield Binns - 1861
...it is termed irregular. A polygon takes its name from the number of sides of .which it is composed. A pentagon has five sides ; a hexagon, six ; a heptagon, seven ; an octagon, eight ; a nonagon, nine ; a decagon, ten , an undecagon, eleven ; and a dodecagon, twelve sides. (24) A circle... ## Rudimentary treatise on mensuration and measuring

Thomas Baker (C.E.) - 1865
...have more than four sides, and receive particular names, according to the number of their sides. Thus, a pentagon has five sides; a hexagon, six; a heptagon, seven; an octagon, eight; &c. They are regular polygons, when all their sides and angles are equal, otherwise irregular polygons.... ## A Treatise on Elementary Geometry: With Appendices Containing a Collection ...

William Chauvenet - 1871 - 368 σελίδες
...number of their sides : A triangle is a polygon of three sides. A quadrilateral is a polygon of four sides. A pentagon has five sides ; a hexagon, six ; a heptagon, seven ; an octagon, eight; an enneagon, nine; a decagon, ten; a dodecagon, twelve; etc. An equilateral polygon is one all of whose... ## First book of mathematics

Hugo Reid - 1872 - 124 σελίδες
...number in the column of perpendiculars opposite the name of the kind of polygon given. 359. Regular polygons are named according to the number of sides : — A Pentagon has five sides. A Hexagon has six sides. A Heptagon has seven sides. An Octagon has eight sides. A Nonagon has nine sides. A... ## A Treatise on Elementary Geometry: With Appendices Containing a Collection ...

William Chauvenet - 1872 - 368 σελίδες
...number of their sides: A triangle is a polygon of three sides. A quadrilateral is a polygon of four sides. A pentagon has five sides ; a hexagon, six ; a heptagon, seven ; an octagon, eight ; an enneagon, nine ; a decagon, ten ; a dodecagon, twelve ; etc. . An equilateral polygon is one all... ## A Treatise on Elementary Geometry: With Appendices Containing a Collection ...

William Chauvenet - 1872 - 368 σελίδες
...number of their sides: A triangle is a polygon of three sides. A quadrilateral is a polygon of four sides. A pentagon has five sides; a hexagon, six; a heptagon, seven; ail octagon, eight; an enneagon, nine; a decagon, ten; a dodecagon, twelve; etc. An equilateral polygon... ## CHAUVENETS TREATISE ON ELEMENTARY GEOMETRY

W. E. BYERLY - 1887
...number of their sides: A triangle is a polygon of three sides. A quadrilateral is a polygon of four sides. A pentagon has five sides; a hexagon, six; a heptagon, seven; an octagon, eight; an enneagon, nine; a decagon, ten; a dodecagon, twelve; etc. An equilateral polygon is one all of whose...