| Thomas Fowler - Logic - 1895 - 620 pages
...Generic Property. It is, for instance, a property of all rectilineal figures that the sum of their **angles is equal to twice as many right angles as the figure has** * F sides, minus four right angles. Thus the angles of a plane triangle are together equal to two right... | |
| George D. Pettee - Geometry, Plane - 1896 - 272 pages
...3 [alt. int. A (||s)] POLYGONS PROPOSITION XXX 43 111. Theorem. The sum of the angles of a polygon **is equal to twice as many right angles as the figure has sides,** less four right angles. Appl. Cons. Dem. i> Prove A + B + C, etc. = (2 n — 4) rt. Draw diagonals... | |
| Queensland. Department of Public Instruction - Education - 1897 - 446 pages
...Show that all the interior angles of any rectilineal 7 figure, together with four right angles, are **equal to twice as many right angles as the figure has sides.** 4. Parallelograms on equal bases, and between the 18 same parallels, are equal in area. 5. The complements... | |
| James Howard Gore - Geometry - 1898 - 232 pages
...interior angle (by 79) is equal to two right angles. That is, the sum of the interior and exterior **angles is equal to twice as many right angles as the figure has sides.** But by (125) the interior angles are equal to twice as many right angles as the figure has sides, less... | |
| Arthur Thomas Walmisley - Leveling - 1900 - 344 pages
...of all the interior angles of any rectilineal figure, together with four right angles, are together **equal to twice as many right angles as the figure has sides.** In a traverse survey the number of stations should be as few as possible, and as much care should be... | |
| Henry Sinclair Hall, Frederick Haller Stevens - Euclid's Elements - 1900 - 330 pages
...COROLLARY 1. All the interior angles of any rectilineal figure, together with four right angles, are **equal to twice as many right angles as the figure has sides.** Let ABODE be any rectilineal figure. Take F, any point within it, and join F to each of the angular... | |
| Sidney Herbert Wells - Machine design - 1900 - 200 pages
...which says that " the interior angles of any straight lined figure together with four right angles are **equal to twice as many right angles as the figure has sides."** The most common of the regular polygons used in engineering designs are the pentagon (five-sided),... | |
| Education - 1902 - 938 pages
...prove that LP is less than LM. 3. Prove that the sum of the interior angles of any rectilineal figure **is equal to twice as many right angles as the figure has sides,** diminished by four right angles. 14. ABC is an equilateral triangle in which AD is drawn perpendicular... | |
| John Whitelaw - Surveying - 1902 - 636 pages
...measurements before leaving the ground, as " the sum of the interior angles of any rectilinear figure **is equal to twice as many right angles as the figure has sides,** less four right angles." In the case of Fig. 73, as the figure is four-sided the sum of the interior... | |
| Charles Godfrey, Arthur Warry Siddons - Geometry - 1903 - 384 pages
...at O = 4 rt. L s. I. 1 Cor. q. ED COR. The sum of the interior angles of any convex polygon together **with four right angles is equal to twice as many right angles as the** polygon has sides. Ex. 388. Three of the exterior angles of a quadrilateral are 79°, 117°, 65° ;... | |
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