 | Robert Simson - Geometry - 1838 - 434 pages
...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 is equal to the two interior and opposite angles CAB, ABC ; and the three interior angles of the triangle, viz. ABC, BCA, CAB, are together equal to two right... | |
 | Euclides - 1838 - 264 pages
...drawn from the eertex to the point of section dieides the outward angle of the triangle into two equal angles. Let ABC be a triangle, and let one of its sides BA be produced to E; and let the outward angle CAE be divided into two equal angles by the straight... | |
 | Euclides - Geometry - 1841 - 378 pages
...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 shall be equal to_ the two interior and opposite angles CAB, ABC: and... | |
 | John Playfair - Euclid's Elements - 1842 - 332 pages
...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 is equal to the two interior and opposite angles CAB, ABC ; and the three... | |
 | Chambers W. and R., ltd - 1842 - 744 pages
...inclination of the hoes is equal, the angles likewise must be equal. Having now proved that the obtuse exterior angle ACD is equal to the two interior and opposite angles CAB, ABC, we have merely to add ACB, the only remaining angle of the triangle, to the angle ACD ; and the angles... | |
 | Euclides - 1842 - 316 pages
...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, вc be produced to D; the exterior angle AC D is equal to the two interior and opposite angles CAB,... | |
 | Euclides, James Thomson - Geometry - 1845 - 382 pages
...remote angles ; and (2) the three interior angles of every triangle are together equal to two right angles. Let ABC be a triangle, and let one of its sides BC be produced to D : (1 ) the exterior angle ACD is equal to the two interior and remote angles CAB, ABC ; and (2)... | |
 | Euclid - Geometry - 1845 - 218 pages
...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 is equal to the two interior and opposite angles CAB, ABC, and the three... | |
 | Euclides - 1845 - 546 pages
...drawn from the vertex to the point of section divides the outward angle of the triangle into two equal angles. Let ABC be a triangle, and let one of its sides BA be produced to E ; and let the outward angle CAE be divided into two equal angles by the straight... | |
 | Euclides - 1846 - 292 pages
...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 shall be equal to the two interior and opposite angles CAB, ABC; and... | |
| |
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. 
