| James Martin (of the Wedgwood inst, Burslem) - 1874
...shall together be equal to two right angles. Construction. Join AC, BD. Demonstration. And because **the three angles of every triangle are equal to two right angles** (I. 32), the three angles of the triangle CAB, viz., 1. The angles CAB, ABC, BCA are equal to two right... | |
| Robert Potts - 1876 - 403 páginas
...any two of its opposite angles shall together be equal to two right angles. Join ^ C, BD. And because **the three angles of every triangle are equal to two right angles,** (I. 32.) the three angles of the triangle CAB, viz. the angles CAB, ABCt BCA, are equal to two right... | |
| Elias Loomis - 1877 - 443 páginas
...sixth part of four right angles (Pr. 2, Sch. 1), or the third part of two right angles. Also, because **the three angles of every triangle are equal to two right angles,** the two angles OAB, OBA are together equal to two thirds of two right angles ; and since AO is equal... | |
| Royal Philosophical Society of Glasgow - 1879
...capable of acting independently of each other, and in co-operation with each other. When I demonstrate **that the three angles of every triangle are equal to two right angles, or that** in a righi^angled triangle the square upon the side subtending the right angle is equal to the sum... | |
| Isaac Taylor - 1879 - 401 páginas
...more readily, and by a simpler and more compact process, than that of the other; If it were denied **that the three angles of every triangle are equal to two right** angle's, an actual measurement of lines, or the placing of two pieces of card one over the other, would... | |
| John Carroll (art master.) - 1881
...angle at M. Produce the lines till they meet in O. The angle at O will be equal to the angle at N ; for **the three angles of every triangle are equal to two right angles.** — Euclid i. 32 cor. Problem 15. — To construct an isosceles triangle, the base FG and the vertical... | |
| Thomas Low Nichols - 1881 - 88 páginas
...abstinence, which is safe and sure. All this is like saying over and over again, two and two make four : **the three angles of every triangle are equal to two right angles** : things which are equal to the same thing are equal to each other. A natural diet is always a condition... | |
| John Fry Heather - 1884
...to the two interior angles HIA and HAT; and because the vertical angles ATH and iv E are equal, and **that the three angles of every triangle are equal to two right angles,** therefore the two angles VIE and s EH are, together, equal to the two angle? AK v and HA i, and therefore... | |
| 1885
...isosceles, and lastly in the scalene; those that came after them proved the general theorem as follows: — **"The three angles of every triangle are equal to two right angles."** So also in the sections of a cone ; for they viewed the so-called " section of the rightangled cone... | |
| George William Usill - 1889 - 272 páginas
...equal to the two interior angles H i A and HA i ; and because the angles A v H and iv E are equal, and **that the three angles of every triangle are equal to two right angles,** therefore the two angles VIE and s EH are together equal to the two angles AH v and HA i, and therefore... | |
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