 | William Hepworth, J. Thomas Lee - 1922 - 432 páginas
...equal to the sum of the two interior and opposite angles, ie, Angle A = Angle B + Angle C. I., 32. The three angles of any triangle are equal to two right angles, or 180 degrees. I., 37. Triangles on equal bases and between the same parallels, that is of the same... | |
 | Walter Berns - 2002 - 164 páginas
...point is that which has no part" and proceeding through Euclid's demonstrations, for instance, that the three angles of any triangle are equal to two right angles. There is intellectual beauty, an elegance, in the Elements—it is one of the Great Books and still... | |
 | 1896 - 606 páginas
...have been 50 cents less per yard. How much did he buy, and at what price? GKOMETRY. — 1. Prove that the three angles of any triangle are equal to two right angles. 2. Prove that the square described on the hypotenuse of a right triangle is equivalent to the sum of... | |
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The three angles of any triangle are equal to two right angles — the pupil need never measure one real triangle to know this. 
