 | Philip Kelland, Peter Guthrie Tait - Quaternions - 1882 - 310 pages
...sign of the term involving cos A is +, seeing that it is in fact — cosine (supplement of A). Ex. 3. The angles of a triangle are together equal to two right angles. What we shall prove in fact is that the exterior angles formed by producing the sides in the same direction... | |
 | James McCosh - Religion - 1883 - 156 pages
...exists ; that such an event, say his marriage, has happened ; and that mathematical truths, such as that all the angles of a triangle are together equal to two right angles, are certain. I am sure that there was such a man as Julius Csesar ; that there is such a city as Rome,... | |
 | Evan Wilhelm Evans - Geometry - 1884 - 170 pages
...produced. It is the supplement of the adjacent interior angle (Theo. 1). THEOREM X. The three interior angles of a triangle are together equal to two right angles. The construction line BE is drawn parallel to AC. EBD = CAB (Theo. III.) CBA = CBA EBD + CBE + CBA = CAB... | |
 | Moses Wolcott Redding - Freemasonry - 1885 - 596 pages
...the most distinguished philosopher of his day. The world is indebted to him for the discovery that the angles of a triangle are together equal to two right angles, and that in any right-angled triangle the square found on the hypothenuse is equal to the sum of the... | |
 | Lewis Carroll - Geometry - 1885 - 318 pages
...Triangle be produced, the exterior angle is equal to each of the interior opposite angles. [I. 32.] (b) The angles of a Triangle are together equal to two right angles. [I. 32.] You will find it convenient to have the Propositions, that have been proposed as Axioms, repeated... | |
 | Charles Josiah Woodward - 1885 - 150 pages
...31° has very nearly the required tangent (0-601) ; so 31° is the angle A. It pjg 2. follows, since the angles of a triangle are together equal to two right angles, that A and B together make one right angle, and, therefore, that B = 90°-31° or 59°. Or B may be... | |
 | James McCosh - Philosophy - 1887 - 272 pages
...exists ; that such an event, say his marriage, has happened ; and that mathematical truths, such as that all the angles of a triangle are together equal to two right angles, are certain. I am sure that there was such a man as Julius Caesar ; that there is such a city as Rome,... | |
 | 1888 - 592 pages
...all civilised and right-minded people, that you should not commit theft. It is also a fixed law that the angles of a triangle are together equal to two right angles. No clear-headed and right-minded man would question the one conclusion more than the other ; but would... | |
 | Choice literature - 1888 - 632 pages
...all civilized and right-minded people, that you should not commit theft. It is also a fixed law that the angles of a triangle are together equal to two right angles. No clear-headed and right-minded man would question the one conclusion more than the other; but would... | |
 | William Stanley Jevons - Logic - 1889 - 544 pages
...world, laws which might be reversed by Almighty God at His good pleasure. Thus, the knowledge that all the angles of a triangle are together equal to two right angles, is scientific knowledge in the strict and accurate sense, but the knowledge that the flame of the candle... | |
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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... 
