| 1867
...в together make up the angle r> с в, which is therefore equal to the angles с в А, в A c. 7. **The three interior angles of every triangle are together equal to two right** anglet. In Fig. 5 the angle BCD has been shown to be equal to the angles с в А, в А с ; to each... | |
| William Enfield, Johann Jakob Brucker - 1791
...four. Of the geometrical theorems afcribed to Pythagoras, the following are the principal; that the **interior angles of every triangle are together equal to two right angles;** that the only polygons which will fill up the whole fpace about a given point, are the equilateral... | |
| Robert Simson - 1806 - 518 sider
...line BC. Which was to be done. i»» —i PROP. XXXII. THEOR. IF a side of any triangle be produced, **the exterior angle is equal to the two interior and...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... | |
| John Playfair - 1806 - 311 sider
...straight line BC. Which was to be done. " PROP. XXXII. THEOR; IF a side of any triangle be produced, **the exterior /' angle is equal to the two interior...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... | |
| John Aikin - 1813
...four. Of the geometrical theorems ascribed to Pythagoras, the following are the principal : that the **interior angles of every triangle are together equal to two right angles** ; that the only polygons which will fill up the whole space about a given point, are the equilateral... | |
| Euclides - 1814
...straight line BC. Which was to be done. • PROP. XXXII. THEOR. IF a side of any triangle be produced, **the exterior angle is equal to the two interior and opposite angles ; and the three** inferior angles of every triangle are equal to two right angles. Let ABC be a triangle, and let one... | |
| Euclides - 1816 - 528 sider
...line BC. Which was to * 27' 1. be done. PROP. XXXII. THEOR. IF a side of any triangle be produced, **the exterior angle is equal to the two interior and...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... | |
| John Playfair - 1819 - 317 sider
...straight linp BC. Which was to be done. PROP. XXXII. THEOR. 'if a side of any triangle bf produced, **the exterior angle is equal to the two interior and...opposite angles ; and the three interior angles of** everif triangle are equal to two right angles. Let ABC be a triangle, and let one of its sides BC be... | |
| John Playfair - 1819 - 333 sider
...done. PROP. xxxn. THEOR.. If a side of any triangle be produced, the exterior ang.Le is equal tojhe **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... | |
| William Enfield - 1819
...1. xiv. c, 33. "Boeth. deMus. 1. iv. c. 14. Pythagorjis, the following are the principal : that the **interior angles of every triangle are together equal to two right angles** ; that the only polygons Which will fill up the whole space about a given point, are the equilateral... | |
| |