 | William Frothingham Bradbury - Geometry - 1880 - 260 pages
...Cor. 3. In a triangle there can be but one right angle, or one obtuse angle. 77. Cor. 4. In a right triangle the sum of the two acute angles is equal to a right angle. 78. Cor. 5. Each angle of an equiangular triangle is equal to one third of two right angles, or two... | |
 | William James Milne - Geometry, Modern - 1899 - 258 pages
...and Z<" in the first equation, Z r + Z s + Z « = 2 rt. A Therefore, etc. QED 111. Cor. I. In a right triangle the sum of the two acute angles is equal to a right angle. 112. Cor. II. A triangle cannot have more than one right angl?, nor more than one obtuse angle. 113.... | |
 | William James Milne - Geometry - 1899 - 404 pages
...and Zi' in the first equation, Z r + Z s + Z t = 2 rt. A Therefore, etc. QED 111. Cor. I. In a right triangle the sum of the two acute angles/ is equal to a light angle. 112. Cor. II. A triangle cannot have more than one right angl?. nor more than one obtuse... | |
 | American School (Chicago, Ill.) - Engineering - 1903 - 390 pages
...sum of the three angles in the triangle would exceed two right angles. 75. Corollary 1 V. In a right triangle the sum of the two acute angles is equal to a right angle. 76. Corollary V. If two angles of a triangle are known, the third can be formed by subtracting their... | |
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... angles of another, the third angles will also be equal, and the two triangles will be mutually equiangular. Cor. 
