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If the sides of a convex polygon are produced in order, the sum of the angles so formed is equal to four right angles.
Calendar - Page 118
by University of Calcutta - 1907
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Logic and Argument

James Hervey Hyslop - Logic - 1899 - 280 pages
...denied. I give an illustration of its method from mathematics. Suppose I am asked to prove that the sum of the angles of a triangle is equal to two right angles. If now I can show either by observation or proof that the sum of the angles of a triangle is equal to...
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Elementary Geometry, Plane and Solid: For Use in High Schools and Academies

Thomas Franklin Holgate - Geometry - 1901 - 462 pages
...the exterior angles, on the same side, are supplementary. § 95. 11. THEOREMS ON CONVEX POLYGONS. (2) If the sides of a convex polygon are produced in order, the exterior angles so formed are together equal to four right angles. §117. 12. THEOREMS ON PARALLELOGRAMS....
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Elementary Geometry: Practical and Theoretical

Charles Godfrey, Arthur Warry Siddons - Geometry - 1903 - 384 pages
...angles are right angles. DBF. A plane figure bounded by straight lines is called a polygon. THEOREM 9. If the sides of a convex polygon are produced in order,...the angles so formed is equal to four right angles. r .>—s y. ;R fig. 95. Data ABODE is a convex polygon; its sides are produced in order and form the...
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The School World: A Monthly Magazine of Educational Work and Progress, Volume 5

Education - 1903 - 692 pages
...line «« parallel to one another. Triangles and Rectilinear Figures. — The sum of the angles of > triangle is equal to two right angles. If the sides of a convex polygon are produced in order, the *"> of the angles so formed is equal to four right angles. If two triangles have two sides of the one...
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School: A Monthly Record of Educational Thought and Progress, Volume 4

Ed - 1905 - 272 pages
...ensure a yearly income of ¿200 ? GEOMETRY. — PART I. (Time allowed, z\ hours) (1) Prove that the sum of the angles of a triangle is equal to two right angles. If the interior angle of a regular polygon is 140°, calculate the number of sides. (2) If two triangles have...
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Calendar

University of Allahabad - 1907 - 528 pages
...AUD EECTILINBAL FIGUBES. The sum of the angles of a triangle is equal to two right anglesIf the side of a convex polygon are produced in order the sum...the angles so formed is equal to four right angles. If two triangles have two sides of the one equal to two sides of the other, each to each, and also...
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Calendar

University of Allahabad - 1908 - 568 pages
...parallel to the same straight line are parallel to one another. TBIANGLES AND EECTILINEAL FIGUBES. The sum of the angles of a triangle is equal to two right angles. If the side of a convex polygon are produced in order the sum of the angles so formed is equal to four right...
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Atti Del ... Congresso Internazionale Dei Matematici ...

Mathematics - 1909 - 605 pages
...which are parallel to the same straight line are parallel to one another. Triangles and Rectilinear Figures. The sum of the angles of a triangle is equal...the angles so formed is equal to four right angles. If two triangles have two sides of the one equal to two sides of the other, each to each, and also...
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Calendar

University of Allahabad - 1909 - 638 pages
...which are parallel to the same straight line are parallel to one another. TRIANGLES AND RECTILINEAR FIGURES. The sum of the angles of a triangle is equal...sides of a convex polygon are produced in order the sura of the angles so formed is equal to four right angles. If two triangles have two sides of the...
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Calendar

University of Allahabad - 1910 - 682 pages
...pair of interior angles on the same side of the cutting line are together equal to two right angles, then the two straight lines are parallel ; and the...the angles so formed is equal to four right angles. If two triangles have two sides of the one equal to two sides of the other, each to each, and also...
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