 | Sir John Leslie - 1809 - 542 pàgines
...An exterior angle of a triangle is equal to both its opposite interior angles, and all the interior angles of a triangle are together equal to two right angles. The exterior angle BCD, formed by the production of the side AC of the triangle ABC, is equal to the two... | |
 | 1810 - 554 pàgines
...deduced. If we could demonftrate, independently of all confideration of parallel lines, that the three angles of a triangle are together equal to two right angles, the object in view would be accomplifhed, and the difficulty, in this part of the Elements, would be entirely... | |
 | John Playfait - 1822 - 550 pàgines
...deduced. If we could demonstrate, independently of all consideration of parallel lines, that the three angles of a triangle are together equal to two right angles, the object in view would be accomplished, and the difficulty, in this pait of the Elements, would be enVOL.... | |
 | John Playfair - 1822 - 554 pàgines
...deduced. If we could demonstrate, independently of all consideration of parallel lines, that the three angles of a triangle are together equal to two right angles, the object in view would be accomplished, and the difficulty, in this part of the Elements, would be entirely... | |
 | Perry Fairfax Nursey - 1831 - 508 pàgines
...before proved that the angle ADe is an acute angle of 90 degrees, whence it follows that as the three angles of a triangle are together equal to two right angles, the remaining angle /AD must likewise be an acute angle of 90 degrees, and, as before, since the two angles/... | |
 | 1831 - 532 pàgines
...before proved that the angle ADe is an acute angle of 90 degrees, whence it follows that as the three angles of a triangle are together equal to two right angles, the remaining angle fh D must likewise be an acute angle of 90 degrees, and, as before, since the two augles/DA... | |
 | 1841 - 524 pàgines
...assertion to be proved, in that the latter does not require any specific object to be effected. Thus, ' all the angles of a triangle are together equal to two right angles ' is to be shown or made evident, and is a theorem ; but ' to draw a circle through three given points... | |
 | 1841 - 1040 pàgines
...assertion to be proved, in that the latter does not require any specific object to be effected. Thus, ' all the angles of a triangle are together equal to two right angles ' is to be shown or made evident, and is a theorem ; but ' to draw a circle through thiee given points'... | |
 | Felix Eberty - 1846 - 110 pàgines
...anything which contradicts it to be absurd. Thus, for example, he to whom the geometrical proposition that the angles of a triangle are together equal to two right angles, has been intelligibly demonstrated, must acknowledge the truth of it ; but he has not necessarily comprehended... | |
 | Samuel Bailey - 1851 - 254 pàgines
...An exterior angle of a triangle is equal to both its opposite interior angles, and all the interior angles of a triangle are together equal to two right angles. The exterior angle BCD formed by the production of the side AC of the triangle ABC, is equal to the / \... | |
| |
Thus, for" example, he to whom the geometrical proposition, that the angles of a triangle are together equal to two right angles... 
