 | Education - 1921 - 1190 pages
...respectively perpendicular to each other, they are either equal or supplementary. 5. Any exterior angle of a triangle is equal to the sum of the two opposite interior angles. 6. The sum of the angles of a convex polygon of n sides is 2 (n-2) right angles. 7. In any parallelogram... | |
 | National Committee on Mathematical Requirements - Mathematics - 1922 - 84 pages
...respectively perpendicular to each other, they are either equal or supplementary. 5. Any exterior angle of a triangle is equal to the sum of the two opposite interior angles. 6. The sum of the angles of a convex polygon of n sides is 2 (tv-2) right angles. 7. In any parallelogram... | |
 | Robert Remington Goff - 1922 - 136 pages
...right angles. *42. The sum of the angles of a triangle equals two right angles. *43. An exterior angle of a triangle is equal to the sum of the two opposite interior angles. 44. // two angles of one triangle equal two angles of another triangle, the third angles are equal.... | |
 | Edson Homer Taylor, Fiske Allen - Mathematics - 1923 - 104 pages
...77. Draw a triangle and construct and read all its exterior angles. 86. Corollary. An exterior angle of a triangle is equal to the sum of the two opposite interior angles. THEOREM IX 87. The sum of the angles of a polygon of n sides is equal to 2n — 4 right angles. 88.... | |
 | National Committee on Mathematical Requirements - Mathematics - 1923 - 680 pages
...respectively perpendicular to each other, they are either equal or supplementary. 5. Any exterior angle of a triangle is equal to the sum of the two opposite interior angles. 6. The sum of the angles of a convex polygon of » sides is 2(n — 2) right angles. 7. In any parallelogram... | |
 | Jacob William Albert Young - Mathematics - 1924 - 484 pages
...respectively perpendicular to each other, they are either equal or supplementary. 5. Ally exterior angle of a triangle is equal to the sum of the two opposite interior angles. 6. The sum of the angles of a convex polygon of n sides is 2 (» - 2) right angles. 7. In any parallelogram... | |
 | National Committee on Mathematical Requirements - Mathematics - 1927 - 208 pages
...perpendicular to each other, they are either equal or supplementary. [17, cd] 5. Any exterior angle of a triangle is equal to the sum of the two opposite interior angles. [24, cd] •/6. The sum of the angles of a convex polygon of n sides is z(n — 2) right angles. [25]... | |
 | Artillery, Coast - 1938 - 422 pages
...of azimuth difference circles. — Two propositions of geometry are used: first, the exterior angle of a triangle is equal to the sum of the two opposite interior angles ; and second, an inscribed angle is measured by one-half the intercepted arc. In figure 13, let A represent... | |
 | Education - 1891 - 392 pages
...demonstration. 6.Prove that the angles of a triangle are equal to two right angles; also, that an exterior angle of a triangle is equal to the sum of the two opposite interior angles. 7.Put the proportional quantities, A : B :: C : D, in proportion by inversion ; by alternation; by... | |
 | John G. Anderson - Shop mathematics - 1983 - 554 pages
...by a double mark on the symbol, etc. PROPOSITION 8: The exterior angle formed by prolonging one side of a triangle is equal to the sum of the two opposite interior angles. Fig. 11-14. An exterior angle of a triangle equals the sum of the two opposite interior angles. In Fig.... | |
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Any exterior angle of a triangle is equal to the sum of the two opposite interior angles. 
