 | Thomas Beddoes - 1793 - 196 pages
...E 2 ferred ferred it either from fome fuch experiment made or imagined ; or from knowing, that the angles of a plane triangle are equal to two right angles. The axiom is ; " if a " ftraight meets two ftraight lines, fo as to " make the two interior angles on the... | |
 | Colin Macfarquhar, George Gleig - 1797 - 450 pages
...truth or falfchood of which there is not fufficient evidence tu produce fcience or abfolute belief That the three angles of a plane triangle are equal to two right angles, is not a matter of opinion, вог сал it with propriety be called an objeci of the mathema•foot... | |
 | Thomas Reid - 1803 - 676 pages
...the propofition is more or lefs extenfive, according as the fubject is. Thus when I am taught, that the three angles of a plane triangle are equal to two right angles, this property extends to every fpecies of plane triangle, and to every individual plane triangle that... | |
 | 1805 - 752 pages
...that there are any qualities in a magnet which neceff'arlfy produce thefe «¡itfis, as we blow that the three angles of a plane triangle are equal to two right angles. The magnet may it the mero inJlrumcnt of fome invifiblc power, as an axe is the infiniment by which a man... | |
 | Encyclopaedia Britannica - 1810 - 814 pages
...or falfehood of which there is not fufficicnt evidence to produce fcience or abfokite belief. That the three angles of a plane triangle are equal to two right angles, is not a matter of opinion, nor can it with "ropriety be called an obje£t of the mathematician's belief:... | |
 | Jeremiah Day - 1815 - 172 pages
...are always equal to 180°. The angles BCA and BCG are together equal to two right angles. 79. Cor. As the three angles of a plane triangle are equal to two right angles, that is, to 180° (Euc, 32. 1.) the' sum of any two of them is the supplement of the other. So that... | |
 | Jeremiah Day - 1815 - 388 pages
...arc always equal to 180°. The angles BCA and BCG are together equal to two light angles. 79. Cor. As the three angles of a plane triangle are equal to two right angles, that is, to IS0* (Euc. 32. 1.) the- sum of any two of them is the supplement of the other. So that... | |
 | 1823 - 886 pages
...or falsehood of which there is not sufficient evidence to produce science or absolute belief. That the three angles of a plane triangle are equal to two right angles, is not a matter of opinion, nor can it with propriety be called an object of the mathematician's belief:... | |
 | Jeremiah Day - 1824 - 440 pages
...are always equal to 180°. The angles BCA and BCG are together equal to two right angles. 79. Cor. As the three angles of a plane triangle are equal to two right angles, that is, to 180° (Euc. 32. 1.) the sum of any two of them is the supplement of the other. So that... | |
 | Thomas Reid - 1827 - 706 pages
...the proposition is more or less extensive, according as the subject is. Thus, when I am taught that the three angles of a plane triangle are equal to two right angles, this property extends to every species of plane triangle, and to every individual plane triangle that... | |
| |
As the three angles of a plane triangle are equal to two right angles, that is, to 180° (Euc, 32. 1.) the' sum of any two of them is the supplement of the other. 
