 | Adrien Marie Legendre - Geometry - 1822 - 394 pages
...polygon, and the lines themselves taken together form the contour or perimeter of the polygon. XIV. The polygon of three sides, the simplest of all, is called a triangle ; that of four sides, a quadilateral ; that of five, a pentagon ; that of six, a hexagon ; and so on. XVI. A right-angled triangle... | |
 | Adrien Marie Legendre - Geometry - 1828 - 346 pages
...polygon, and the lines themselves taken together form the contour, or perimeter of the polygon. 14. The polygon of three sides, the simplest of all, is...that of five, a pentagon ; that of six, a hexagon ; and so on. 15. An equilateral triangle is one which has its three sides equal ; an isosceles triangle,... | |
 | John Playfair - Euclid's Elements - 1835 - 336 pages
...polygon, and the lines themselves taken together form the contour, or perimeter of the polygon. 17. The polygon of three sides, the simplest of all, is...that of five, a pentagon ; that of six, a hexagon ; and so on. 18. Of three sided figures, an equilateral triangle is that which has three equal sides.... | |
 | Adrien Marie Legendre - Geometry - 1836 - 394 pages
...polygon, and the lines themselves, taken together, form the contour, or perimeter of the polygon. 14. The polygon of three sides, the simplest of all, is...heptagon; that of eight, an octagon ; that of nine, a nonagon; that of ten, a decagon ; and that of twelve, a dodecagon. B 15. An equilateral triangle... | |
 | Charles Davies - Surveying - 1839 - 376 pages
...polygon, and the lines themselves, taken together, form the contour, or perimeter of the polygon. 14. The polygon of three sides, the simplest of all, is...heptagon; that of eight, an octagon; that of nine a nonagon ; that of ten, a decagon; that of twelve, a dodecagon. 15. An equilateral triangle is one... | |
 | Charles Davies - Surveying - 1839 - 376 pages
...polygon, and the lines themselves, taken together, form the contour, or perimeter of the polygon. 14. The polygon of three sides, the simplest of all, is...triangle; that of four sides, a quadrilateral; that of live, & pentagon; that of six, a hexagon ; that of seven, a heptagon; that of eight, an octagon; that... | |
 | John Fair Stoddard - Arithmetic - 1856 - 312 pages
...the sides of which are terminated by straight lines, is called a POLYGON. A polygon of three sides is called a TRIANGLE ; that of four sides a QUADRILATERAL ; that of five sides. a PENTAGON ; that of six, a HEXAGON ; that of seven, a HEPTAGON ; that of eight, an OCTAGON... | |
 | Adrien Marie Legendre, Charles Davies - Geometry - 1857 - 442 pages
...terminated on all sides by straight lines. The broken line that bounds a polygon is called its perimeter. 19. The polygon of three sides, the simplest of all,...nonagon ; that of ten, a decagon ; and that of twelve, a •iodecagon. 20. An EQUILATERAL polygon is one which has all its sides equal ; an equiangular polygon,... | |
 | Elias Loomis - Conic sections - 1857 - 242 pages
...polygon of three sides is the simplest of all, and is called a triangle ; that of four sides is called a quadrilateral : that of five, a pentagon ; that of six, a hexagon, &c. 15. An equilateral triangle is one which has its three sides equal. / \ An isosceles triangle is... | |
 | Elias Loomis - Conic sections - 1858 - 256 pages
...polygon of three sides is the simplest of all, and is called a triangle; that of four sides is called a quadrilateral; that of five, a pentagon ; that of six, a hexagon, &c. 15. An equilateral triangle is one which has its three sides equal. / \ An isosceles triangle is... | |
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If the lines are straight, the space they enclose is called a rectilineal figure, or polygon, and the lines themselves, taken together, form the contour, or perimeter of the polygon. 14. The polygon of three sides, the simplest of all, is called a triangle... 