 | Euclides - 1852 - 152 sider
...two right angles, or all the four angles are equal to four right angles.] COR. 2. And consequently that All the angles made by any number of lines meeting...one point, are together equal to four right angles. PEOP. XVI. THEOR. If one side of a triangle be produced, the exterior angle is greater than either... | |
 | Euclides - 1853 - 146 sider
...at the point where they cut, are together equal to four right angles. COR. 2. — And consequently that all the angles made by any number of lines meeting...one point are together equal to four right angles. PROP. XVI. THEOREM. Jf one side of a triangle be produced, the exterior angle is greater than either... | |
 | Euclides - 1853 - 176 sider
...make at the point where they cut, are together equal to four right angles. COR. 2. And consequently that all the angles made by any number of lines meeting...one point, are together equal to four right angles. PROPOSITION XVI. — THEOREM. If one side of a triangle be produced, the exterior angle is greater... | |
 | Royal Military Academy, Woolwich - 1853 - 400 sider
...make at the point where they cut, are together equal to four right angles. COR. 2. And consequently that all the angles made by any number of lines meeting...one point, are together equal to four right angles. PROPOSITION XVI. THEOR. If one side of a triangle be produced, the exterior angle is greater than either... | |
 | Elias Loomis - 1858 - 256 sider
...are together equal to four right angles. Cor. 2. Hence, all the angles made by any number of straight lines meeting in one point, are together equal to four right angles. PROPOSITION VI. THEOREM. If two triangles have two sides, and the included angle of the one, equal... | |
 | Robert Potts - 1860 - 380 sider
...make at the point where they cut, are together equal to four right angles. COR. 2. And consequently that all the angles made by any number of lines meeting...one point, are together equal to four right angles. PROPOSITION XVI. THEOREM. If one side of a triangle be produced, the exterior angle is greater than... | |
 | Euclides - 1860 - 288 sider
...their intersection, are together equal to four right angles. COR. 2. — And hence, all the consecutive angles made by any number of lines meeting in one point, are together equal to four right angles. PROPOSITION XVI. THEOREM. If one side of a triangle be produced, the exterior angle is greater than... | |
 | Euclides - 1862 - 172 sider
...make at the point where they cut, are together equal to four right angles. Cor. 2. And, consequently, that all the angles made by any number of lines meeting...one point, are together equal to four right angles. PROP. XVI.— THEOREM. If one side of a triangle be produced, Let ABC be a triangle, and let the side... | |
 | Euclides - 1864 - 448 sider
...make at the point where they cut, are together equal to four right angles. COR. 2. And consequently that all the angles made by any number of lines meeting...one point, are together equal to four right angles. PROPOSITION XVI. THEOREM. If one side of a triangle be produced, the exterior angle is greater than... | |
 | Euclides - 1865 - 402 sider
...make at the point where they cut, are together equal to four right angles. Cor. 2. And, consequently, that all the angles made by any number of lines meeting...one point, are together equal to four right angles. PROP. XVI.— THEOREM. If one side of a triangle te prodnced, then the exterior angle is greater than... | |
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Therefore if two straight lines, &c. QED COR. 1. From this it is manifest, that, if two straight lines cut one another, the angles they make at the point where they cut, are together equal to four right angles. 
