 | Webster Wells - Geometry - 1894 - 400 pages
...the angles of any triangle is equal to two right angles.] (§82.) Hence, ihe sum of the angles of the polygon is equal to two right angles taken as many times, less two, as the polygon has sides. 127. COR. I. The sum of the angles of any polygon is equal to twice as many right angles as the polygon... | |
 | Webster Wells - Geometry - 1894 - 394 pages
...so as to coincide throughout. PROPOSITION XLVT. THEOREM. 126. The sum of the angles of any poli/gon is equal to two right angles taken as many times, Less two, as the polygon has sides. Any polygon may be divided into triangles by drawing diagonals from one of its vertices ; the number... | |
 | John Tilden Prince - Arithmetic - 1894 - 246 pages
...are equal. 7. The sum of the three angles of a triangle is equal to two right angles. The sum of the angles of a polygon is equal to two right angles taken as many times as the figure has sides less two. It is not desirable at this time for the .pupils to spend much time... | |
 | Albany (N.Y.). Board of Public Instruction - Education - 1895 - 624 pages
...the triangle. 24-25. To bisect a right angle. 26-27. To trisect a right angle. 28-30. Prove that the sum of the interior angles of a polygon is equal to...two right angles taken as many times less two as the figure has sides. 31-32. To construct a right triangle, having given the base and the hypotenuse. 33-35.... | |
 | Joe Garner Estill - 1896 - 214 pages
...point not in the perpendicular is unequally distant from the extremities of the line. 2. Prove that the sum of the interior angles of a polygon is equal to...two right angles taken as many times less two as the figure has sides. Define a polygon, also a right angle. 3. Prove that the tangents to a circle drawn... | |
 | Joe Garner Estill - 1896 - 186 pages
...point not in the perpendicular is unequally distant from the extremities of the line. 2. Prove that the sum of the interior angles of a polygon is equal to...two right angles taken as many times less two as the figure has sides. Define a polygon, also a right angle. 3. Prove that the tangents to a circle drawn... | |
 | George Albert Wentworth - Mathematics - 1896 - 68 pages
...median of a trapezoid is parallel to the bases, and is equal to half the sum of the bases. 205. The sum of the interior angles of a polygon is equal to...right angles, taken as many times less two as the figure has sides. 206. Cor. The sum of the angles of a quadrilateral equals two right angles taken... | |
 | George Washington Hull - Geometry - 1897 - 408 pages
...are equal if when applied to each other they coincide throughout. PROPOSITION XXXVI. THEOREM. 98. The sum of the interior angles of a polygon is equal to...as many times, less two, as the polygon has sides. Given—The polygon ABODEF. D To Prove—The sum of the angles equal to two right angles taken as many... | |
 | George Albert Wentworth - Geometry - 1898 - 462 pages
...sides, a decor/on; one of twelve sides, a dodecagon. PROPOSITION XLIV. THEOREM. 205. The sum of tfie interior angles of a polygon is equal to two right angles, taken as many times less two as the figure has sides. A. B Let the figure ABCDEF be a polygon having n sides. Toprovc ZA+ZU + ZC, etc.... | |
 | Webster Wells - Geometry - 1898 - 284 pages
...to the other so as to coincide throughout. i PROP. XLV. THEOREM. 126. The sum of the angles of any polygon is equal to two right angles taken as many times, less two, as the polygon has sides. Given a polygon of n sides. To Prove the sum of its A equal to n — 2 times two rt. A. Proof. The... | |
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The sum of the interior angles of a polygon is equal to two right angles, taken as many times less two as the figure has sides. 
