| Queensland. Department of Public Instruction - Education - 1897 - 446 pages
...3. 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... | |
| George D. Pettee - Geometry, Plane - 1896 - 272 pages
...[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... | |
| James Howard Gore - Geometry - 1898 - 232 pages
...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 four right angles. Therefore the exterior angles alone are equal to four right angles. QED EXERCISES.... | |
| Henry Sinclair Hall, Frederick Haller Stevens - Euclid's Elements - 1900 - 330 pages
...angles. I. 15, Cor. Therefore all the interior angles of the figure, together with four right angles, **are equal to twice as many right angles as the figure has sides.** QEI>. COROLLARY 2. If the sides of a rectilineal figure, which has no re.entrant angle, are produced... | |
| 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),... | |
| 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... | |
| 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... | |
| Education - 1902 - 942 pages
...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... | |
| 1903 - 898 pages
...A.] 1. Show that 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.** A BCD is a quadrilateral figure, and the angles at A, B, C and D are bisected. Straight lines are drawn... | |
| American School (Chicago, Ill.) - Engineering - 1903 - 392 pages
...ABCDEF oe the given polygon. To prove that the sum of the interior angles A, B, C, D, E, and F, is **equal to twice as many right angles as the figure has sides** minus two. If from any vertex as A, diagonals AC, AD, AE, are drawn, the polygon will be divided into... | |
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