 | Encyclopedias and dictionaries - 1853 - 1036 pages
...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'... | |
 | Felix Eberty - Astronomy - 1854 - 100 pages
...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... | |
 | Richard Pearson (Philosophical Writer.) - Philosophy - 1863 - 144 pages
...faithfully is a wise man, is as true and unchangeable as the mathematical proposition that says that all the angles of a triangle are together equal to two right angles. But wisdom cannot be measured with the accuracy of an angle ; and if it could, the moral subject to... | |
 | 1865 - 520 pages
...day, tracing figures by which, independent and innocent of Euclid, the boy had made the discovery that the angles of a triangle are together equal to two right angles. There is a similar anecdote of James Watt having been observed, as a child of six years old, drawing... | |
 | Thomas Fowler - Logic - 1867 - 218 pages
...angles is equal to twice as many right angles as the figure has sides, minus four right angles. Thus the angles of a triangle are together equal to two right angles, those of a quadrilateral to four, those of a pentagon to six, and so on. It is also a property of a... | |
 | Literature - 1868 - 978 pages
...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... | |
 | Joseph Fernandez - Dictation (Educational method) - 1868 - 188 pages
...or on parade. The angels, in great hosts, were with the shepherds, at our Saviour's birth. The three angles of a triangle are together equal to two right angles. The smugglers cast overboard nine ankers of brandy, and fastened them to the anchor of the ship. On antique... | |
 | Felix Eberty - Astronomy - 1868 - 104 pages
...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... | |
 | Isaac Stone - Educational tests and measurements - 1869 - 278 pages
...angles can be formed about a given point ? 207. Demonstrate, and use Algebraic symbols, if desired : The angles of a triangle are together equal to two right angles. 208. When two straight lines cross each other the opposite or vertical angles are equal. 209. If a... | |
 | Isaac Stone - Educational tests and measurements - 1869 - 272 pages
...affgles can be formed about a given point? 207. .Demonstrate, and use Algebraic symbols, if desired : The angles of a. triangle are together equal to two right angles. 208. When two straight lines cross each other the opposite or vertical angles are equal. 209. If a... | |
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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... 
