 | Adrien Marie Legendre - Geometry - 1852 - 436 pages
...angle must be nothing. Still less, can a triangle have more than one obtuse angle. Cor. 4. In every right-angled triangle, the sum of the two acute angles is equal to one right angle. Cor. 5. Since every equilateral triangle is also equiangular (P. 11, C. 1), each of... | |
 | Charles Davies - Geometry - 1854 - 436 pages
...angle must be nothing. Still less, can a triangle have more than one obtuse angle. Cor. 4. In every right•angled triangle, the sum of the two acute angles is equal to one right angle. Cor. 5. Since every equilateral triangle is also equiangular (P. 11, c. 1), each of... | |
 | Peter Nicholson - Cabinetwork - 1856 - 518 pages
...of the two angles C and B ; that is, since the angle BAD is equal to the sum of the two angles BAE, EAD, the angle BAD is equal to the sum of the angles...angles. Draw the diagonal BD. The triangles ADB, DBC, have the common D. side DB; also, because of the parallels, AB, CD, the angle ABD is equal to CDB (theorem... | |
 | Adrien Marie Legendre, Charles Davies - Geometry - 1857 - 442 pages
...angle must be nothing. Still less, can a triangle have more than one obtuse angle. Car. 4. In every right•angled triangle, the sum of the two acute angles is equal to one right angle. Cor. 5. Since every equilateral triangle is also equian gular (p. 11, c. 1), each... | |
 | William E. Bell - Bridge building - 1857 - 250 pages
...angle would be nothing. Still less can any triangle have more than one obtuse angle. Cor. 5. In every right-angled triangle, the sum of the two acute angles is equal to one right angle. Proposition XVII. Theorem. c In every itonxle* triangle, the angle* opposite the equal... | |
 | Elias Loomis - Conic sections - 1858 - 256 pages
...third angle would be nothing. Still less can a triangle have more than one obtuse angle. Cor. 4. In a right-angled triangle, the sum of the two acute angles is equal to one right angle. Cor. 5. In an equilateral triangle, each of the angles is one third of two right angles,... | |
 | William E. Bell - Bridges - 1859 - 226 pages
...angle would be nothing. 8till less can any triangle have more than one obtuse angle. Cor. 5. 1n every right-angled triangle, the sum of the two acute angles is equal to one right angle. Proposition XVII. Theorem. c In every isosceles triamjle, the angles opposite the... | |
 | William Frothingham Bradbury - Geometry - 1872 - 262 pages
...Cor. 3. In a triangle there can be but one right angle, or one obtuse angle. 37i Cor. 4. In a right triangle the sum of the two acute angles is equal to a right angle. 38. Cor. 5. Each angle of an equiangular triangle is equal to one third of two right angles, or two... | |
 | William Frothingham Bradbury - Geometry - 1872 - 124 pages
...Cor. 3. In a triangle there can be but one right angle, or one obtuse angle. 37. Cor. 4. In a right triangle the sum of the two acute angles is equal to a right angle. 38. Cor. 5. Each angle of an equiangular triangle is equal . to one third of two right angles, or two... | |
 | Elias Loomis - Conic sections - 1877 - 458 pages
...angle would be nothing. Still less can a triangle have more than one obtuse angle. • Cor. 4. In a right-angled triangle, the sum of the two acute angles is equal to one right angle ; that is, each of the acute angles is the complement of the other. Cor, 5. In an equilateral... | |
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... angles of another, the third angles will also be equal, and the two triangles will be mutually equiangular. Cor. 
