 | James McCosh - 1889 - 390 σελίδες
...that there is such a country. It is not by immediate perception, but by reasoning, that we know that the angles of a triangle are together equal to two right angles. But there are truths which are seen at once on the bare inspection of the objects. We know ourselves... | |
 | William Ernest Johnson - 1889 - 574 σελίδες
...to — 1. cox A is + *e; and algebraically increases from 1 to o> . 140. From the proposition that the angles of a triangle are together equal to two right angles many important results follow. Thus, if А, В, С are the angles of a triangle, we have А+Б+С=Ш°,... | |
 | St. George Jackson Mivart - 1889 - 632 σελίδες
...consideration of but a few, sometimes but one or two, instances. Thus no one can pretend we know that " the angles of a triangle are together equal to two right angles," by a complete induction — by an examination of every existing triangle. The examination of a very... | |
 | Herman Tyson Lukens - 1895 - 200 σελίδες
...the new judgment only adds a further explanation. Thus, for example, the geometrical proposition, " the angles of a triangle are together equal to two right angles," is a genuine judgment. The act of conception, to which it tends, consists in the completion of the... | |
 | George Frederick Stout - 1896 - 328 σελίδες
...particular is not enough ; we must contra-distinguish identity from differences. If we follow the proof that the angles of a triangle are together equal to two right angles, in the case of a particular triangle, this particular one is for us representative of all others, because,... | |
 | 1893 - 652 σελίδες
...ceittrc of the circle than the Ifgs. Suppose we had two straight lines at right angles (case 1). Fm. 33. The angles of a triangle are together equal to two right angles, therefore the marked angle is loss than a right angle, and the thickened line less than the dotted... | |
 | George Frederick Stout - 1902 - 330 σελίδες
...is not enough ;. we must centra-distinguish identity from differences. If we follow the proof that the angles of a triangle are together equal to two right angles, in the case of a particular triangle, this particular one is for us representative of all others, because,... | |
 | Gordon Augustus Southworth - 1903 - 152 σελίδες
...one right angle ; an obtuse triangle has one obtuse angle ; an acute triangle has three acute angles. The angles of a triangle are together equal to two right angles, 180°. Underwriters. Insurance companies. Unit. One ; a single thing. Vertex. The point in an angle... | |
 | Gordon Augustus Southworth, John Charles Stone - 1904 - 334 σελίδες
...one right angle ; an obtuse triangle has one obtuse angle ; an acute triangle has three acute angles. The angles of a triangle are together equal to two right angles, 180°. Underwriters. Insurance companies. Unit. One ; any thing used as a basis or standard of measurement... | |
 | William Stanley Jevons - 1905 - 368 σελίδες
...distributively in the minor, so that the whole is divided into its parts. Thus it might be argued, "All the angles of a triangle are (together) equal to two right angles ; ABC is an angie of a triangle ; therefore ABC is equal to two right angles." Or again, " The inhabitants... | |
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Thus, for" example, he to whom the geometrical proposition, that the angles of a triangle are together equal to two right angles... 
