 | Geography - 1867 - 878 pages
...Iciati connected with our present subject. Euclid has proved, in the 32nd Proposition of his First BccV. that the three interior angles of every triangle are equal to two right angles, that is, to 180°. Let the hear this fact in mind. Hence it follows that if the of any two... | |
 | Robert Simson - Trigonometry - 1775 - 534 pages
...any triangle be producedi the exterior angle is equal to the two interior and oppofite angles ; and the three interior angles of every triangle are equal to two right angles. Let ABC be a triangle, and let one of its fides BC be produced to D ; the exterior angle ACD... | |
 | Euclid - 1781 - 552 pages
...any triangle be produced, the exterior angle is equal to the two interior and oppofite angles ; and the three interior angles of every triangle are equal to two right angles. Let ABC be a triangle, and let one of its fides BC be produced to D ; the exterior angle ACD... | |
 | Robert Simson - Trigonometry - 1781 - 534 pages
...any triangle be produced, the exterior angle is equal to the two interior and oppofite angles ; and the three interior angles of every triangle are equal to two right angles. Let ABC be a triangle, and let one of its fides BC be produced to D. the exterior angle ACD... | |
 | Euclid, John Playfair - Euclid's Elements - 1795 - 462 pages
...triangle be produced, the exterior J. angle is equal to the two interior and oppofite angles ; and the three interior angles of every triangle are equal to two right angles. Let ABC be a triangle, and let one of its fides BC be produced to D ; the exterior angle ACD... | |
 | William Seward - Anecdotes - 1796 - 418 pages
...that the exterior angle of every '" triangle is equal to the two interior andoppofite '** angles, and that the three interior angles of " every triangle are equal to two right-angles, '" which is the yd Propofition of the Firft Book - « of Euclid. This and the feveral... | |
 | William Seward - Anecdotes - 1796 - 430 pages
...that the exterior angle of every " triangle is equal to the two interior andoppofite " angles, and that the three interior angles of " every triangle are equal to two right-angles, " which is the yA Propofition of the Firft Book " of Euclid. Thrs and the feveral intermediately... | |
 | Alexander Ingram - Trigonometry - 1799 - 374 pages
...any triangle be produced, the exterior angle is equal to the two interior and oppoiite angles ; and the three interior angles of every triangle are equal to two right angles. Let ABC be a triangle, and let one of its fides BC be produced to D ; the exterior angle ACD... | |
 | Robert Simson - Trigonometry - 1804 - 530 pages
...any triangle be produced, the exterior angle is equal to the two interior and oppofite angles ; and the three interior angles of every triangle are equal to two right angles. Let ABC be a triangle, and let one of its fides BC be produced to D. the exterior angle ACD... | |
 | Euclides - 1816 - 588 pages
...any triangle be produced, the exterior angle is equal to the two interior and opposite angles ; and the three interior angles of every triangle are equal to two right angles. Let ABC be a triangle, and let one of its sides BC be produced to D; the exterior angle ACD... | |
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If a side of any triangle be produced, the exterior angle is equal to the two interior and opposite angles ; and the three interior angles of every triangle are equal to two right angles. 
