| George Albert Wentworth - Geometry, Plane - 1899 - 272 pages
...mutually equilateral and mutually equiangular, they are equal, for they can be made to coincide. 204. **A polygon of three sides is called a triangle ; one...sides, a heptagon ; one of eight sides, an octagon** ; one of ten sides, a decagon ; one of twelve sides, a dodecacion. BOOK I. PLANE GEOMETRY. PROPOSITION... | |
| International Correspondence Schools - Civil engineering - 1899 - 722 pages
...line ABCD EA is the perimeter. 33. Polygons are classified according to the number of their sides: One **of three sides is called a triangle; one of four sides,...sides, a heptagon ; one of eight sides, an octagon** ; one of ten sides, a decagon; one of twelve sides, a dodecagon ; etc. 34. Equilateral polygons are... | |
| Charles Austin Hobbs - Geometry, Plane - 1899 - 266 pages
...coincide. 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...sides, a heptagon; one of eight sides, an octagon;** one of ten sides, a decagon; one of twelve sides, a dodecagon, and so on. In general, the names of... | |
| George Albert Wentworth - Geometry, Modern - 1899 - 272 pages
...mutually equilateral and mutually equiangular, they are equal, for they can be made to coincide. 204. **A polygon of three sides is called a triangle; one...of four sides, a quadrilateral; one of five sides,** & pentagon; one of six sides, a hexagon ; one of seven sides, a heptagon ; one of eight sides, an octagon... | |
| Wooster Woodruff Beman, David Eugene Smith - Geometry - 1899 - 416 pages
...to the other, when the angles of the one are respectively equal to the angles of the other. / 7 55. **A polygon of three sides is called a triangle ; one of four sides, a quadrilateral.** 56. Any side of a polygon may be called its base, the side on which the figure appears to stand being... | |
| George Albert Wentworth - Geometry - 1899 - 500 pages
...mutually equilateral and mutually equiangular, they are equal, for they can be made to coincide. 204. **A polygon of three sides is called a triangle; one of four sides,** a.quadrilateral; one of five sides, a pentagon ; one of six sides, a hexagon ; one of seven sides,... | |
| William James Milne - Geometry, Modern - 1899 - 258 pages
...sides. 162. 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 of six sides, a hexagon** ; on3 of seven sides, a heptagon ; one of eight sides, an octagon ; one of ten sides, a decagon; one... | |
| 1900 - 732 pages
...line ABCDEA 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...sides, a heptagon ; one of eight sides, an octagon** ; one of ten sides, a decagon ; one of twelve sides, a dodecagon, etc. 699. Equilateral polygons are... | |
| International Correspondence Schools - Coal mines and mining - 1900 - 712 pages
...is the perimeter. FIG. aa. 698. Polygons are classified according to the number of their sides : One **of three sides is called a triangle ; one of four...sides, a heptagon ; one of eight sides, an octagon** ; one of ten sides, a decagon ; one of twelve sides, a dodecagon, etc. 699. Equllateral polygons arc... | |
| Thomas Franklin Holgate - Geometry - 1901 - 462 pages
...it will be understood that any figure under discussion is convex. A polygon of five sides is called **a pentagon ; one of six sides, a hexagon ; one of...sides, a heptagon ; one of eight sides, an octagon** ; one of ten sides, a decagon ; one of twelve sides, a dodecagon. 337. POSTULATE 8. A circle may be... | |
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