| Charles Davies - Geometrical drawing - 1840 - 264 pages
...figure, or polygon. The lines themselves, taken together, are called the perimeter of the polygon. Hence, **the perimeter of a polygon is the sum of all its sides.** Q.UEST. — 8. From the same point, how many perpendiculars can be drawn to a line 1 If oblique lines... | |
| Charles Davies - Geometrical drawing - 1846 - 254 pages
...decagon. A polygon of twelve sides, is called a dodecagon. 5. What is the perimeter of a polygon ? **The perimeter of a polygon is the sum of all its sides.** 6. What is the least number of straight lines which can enclose a space? Three straight lines, are... | |
| Daniel Adams - Arithmetic - 1849 - 142 pages
...Mixtilinear Plane Figures are planes bounded by lines and curves. EECTILINEAK PLANE FIGURES. IT 3O. **1. .Rectilinear plane figures are called Polygons....and their sides about the equal angles proportional.** 6. A Triangle is a polygon of three sides. Thus, ABC is a triangle. IT 20. Topic. Plane figures. Rectilinear... | |
| Benjamin Greenleaf - Arithmetic - 1849 - 336 pages
...A REGULAR POLYGON is a plane rectilineal figure, which has all its sides and all its angles equal. **The perimeter of a polygon is the sum of all its sides.** ART. 334. To find the area of a regular polygon. QUESTIONS. — Art. 320. What is a trapezium ? What... | |
| Almon Ticknor - Measurement - 1849 - 156 pages
...called a dodecagon. The lines of a polygon, taken together, are called the perimeter of the polygon. **The perimeter of a polygon is the sum of all its sides.** ' . An equilateral polygon is one which has all its sides equal. An equiangular polygon is one which... | |
| Charles Davies - Geometry - 1850 - 218 pages
...or polygon. The lines themselves, taken together, are called the peri?neter of the polygon. Hence, **the perimeter of a polygon is the sum of all its sides.** 37. A polygon of three sides is called a triangle. 38. A polygon of four sides is called a quadrilateral.... | |
| Charles Davies - Geometry - 1850 - 238 pages
...figure, or polygon. The lines themselves, taken together, are called the perimeter of the polygon. Hence, **the perimeter of a polygon is the sum of all its sides.** 37. A polygon of three sides is called a triangle. 38. A polygon of four sides is called a quadrilateral.... | |
| Benjamin Greenleaf - 1851 - 332 pages
...A REGULAR POLYGON is a plane rectilineal figure, which has all its sides and all its angles equal. **The perimeter of a polygon is the sum of all its sides.** ART. 334. To find the area of a regular polygon. QUESTIONS. — Art. 320. What is a trapezium? What... | |
| Benjamin Greenleaf - 1854 - 342 pages
...REGULAR POLYGON is a plane rectilineal figure, which has all its sides and all its angles equal. , **The perimeter of a polygon is the sum of all its sides.** ART. 334. To find the area of a regular polygon. QUESTIONS. — Art. 320. What is a trapezium 1 What... | |
| Charles Davies - Geometry - 1855 - 340 pages
...figure, or polygonThe lines themselves, taken together, are called the perimeter of the polygon- Hence, **the perimeter of a polygon is the sum of all its sides-** 37 A polygon of three sides is called a triangle38 A polygon of four sides is called a quadrilateral39... | |
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