| Robert Simson - Trigonometry - 1762 - 466 pages
...therefore if one fide, &c. Q._E. D. PROP. XVII. THEOR. AN Y two angles of a triangle are together lefs **than two right angles. Let ABC be any triangle ; any two of its angles together are** lefs than two right angles. Produce BC to D; and becaufe ACD is the exterior angle of the triangle... | |
| Robert Simson - Trigonometry - 1775 - 520 pages
...Therefore, if one fide, &c. Q;.ED PROP. XVII. THEO R. ANY two angles of a triangle are together lefs **than two right angles. Let ABC be any triangle ; any two of its angles together are** lefs than two right angles. Produce BC to D ; and becaufe ACD is the exterior angle of the triangle... | |
| Euclid - 1781 - 550 pages
...Therefore, if one fide, &c. Q^ ED A PROP. XVII. THEO R. NY two angles of a triangle arc together lefs **than two right angles. Let ABC be any triangle ; any two of its angles together are** lefs than two right angles. Produce BC to D ; and becaufe ACD is the exterior angle of the triangle... | |
| Alexander Ingram - Trigonometry - 1799 - 351 pages
...Q^ED b i5. i. A a i6. i. b i3. i. PROP. XVII. THEOR. NY two angles of a triangle are together lefs **than two right angles. Let ABC be any triangle ; any two of its angles together are** lefs than two right angles. Produce BC to D ; and becaufe ACD is the exterior angle of the triangle... | |
| Robert Simson - Trigonometry - 1804
...therefore if one fide, &c. Q^ ED A PROP. XVII. THEOR. NY two angles of a triangle are together lefs **than two right angles. Let ABC be any triangle ; any two of its angles together are** lefs than two tight angles. Produce BC to D; and becaufe ACD is the exterior angle of the triangle... | |
| John Playfair - Euclid's Elements - 1804 - 470 pages
...Book I. any two of its angles together are lefs than two right angles. Produce BC to D ; and becaufe **ACD is the exterior angle of the triangle ABC, ACD is greater** a than the interior ' and cppofite angle ABC ; to each of thefe add the angle ACB ; therefore B CD... | |
| John Playfair - Euclid's Elements - 1806 - 320 pages
...if*b -the angle ACD, is greater than the angle ABC. Therefore, if one side, &c. Q. E, D. PROP. XVII. **THEOR. ANY two angles of a triangle are together less than two right angles. Let ABC be any triangle** j any two of its angles together are less than two right angles. Produce BC to D; and because ACD is... | |
| Robert Simson - Trigonometry - 1806 - 518 pages
...that is d, the angle ACD, is greater than the angle ABC. Therefore, if one side, &c. QED PROP. XVII. **THEOR. ANY two angles of a triangle are together less than two right angles.** A Let ABC be any triangle ; any two of its angles together are less than two right angles. Produce... | |
| Sir John Leslie - Geometry, Plane - 1809 - 522 pages
...vertical angle BCF (Def. 10.), and hence BCF must be greater than either the angle CBA or CAB. PROP. XI. **THEOR. Any two angles of a triangle are together less than two right angles.** The two angles BAC and BCA of the triangle ABC are together less than two right angles. For produce... | |
| Euclid - Geometry - 1810 - 518 pages
...that is d, the angle ACD, is greater than the angle ABC. ThereTore, if one side, &c. QED PROP. XVII. **THEOR. ANY two angles of a triangle are together less...than two right angles. Let ABC be any triangle; any** A . two of its angles together are less than two right angles. . Produce BC to D; and because ACD is... | |
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