| Euclides - 1841
...any two of its opposite angles shall together be equal to two right angles. Join AC, BD; and because **the three angles of every triangle are equal* to two right angles,** the three * 32. 1. angles of the triangle CAB, viz. the angles CAB, ABC, BCA are equal to two right... | |
| John Playfair - 1842 - 317 páginas
...triangles, the four oblique angles of which are equal to the three angles of the triangle, therefore **the three angles of every triangle are equal to two right angles.** Though this method of treating the subject is strictly demonstrative, yet, as the reasoning in the... | |
| Robert Halley - 1844 - 620 páginas
...it is weak. He avows in his severest passages that he has as little angry feeling, as when he says, **that " the three angles of every triangle are equal to two right angles** ;" but how much more Christian-like may be this cool, apathetic mode of vituperation, the sardonic... | |
| 1844 - 472 páginas
...prospect, before a dark cave, or a dreadful precipice. It is not more evident to the mathematician, **that the three angles of every triangle are equal to two right angles,** than it is to all mankind, that justice and mercy excel tyranny and oppression. 6. Another desolating... | |
| 1844
...proposition, too, would follow the converse of the first one, if ever the sum differed from 180". PROP. III. **The three angles of every triangle are equal to' two right angles.** B ' Let ABC be any equilateral trlanglfe ; ./\ / \ bisect its angles, which obviously will {[ •£... | |
| Plato, Tayler Lewis - 1845 - 378 páginas
...we say it is compelled to affirm, and does affirm this, with the same confidence as the proposition **that the three angles of every triangle are equal...not only our highest, but our only idea of truth.** Hence, having the idea, or that notion under which it is forced to think of matter, the soul affirms... | |
| Robert Simson - 1845 - 199 páginas
...: any two of its opposite angles are together equal to two right angles. Join AC, BD : And because **the three angles of every triangle are equal* to two right angles,** the three angles of the triangle CAB, viz. the angles CAB, ABC, BCA are equal to two right angles :... | |
| Robert Potts - 1845
...any two of its opposite angles shall together be equal to two right angles. Join AC, 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, ABC, BCA, are equal to two right... | |
| Edward Shaw - 1846 - 192 páginas
...straight lines AF and BD, and consequently making the angle at G equal to the angle F А С ; and since **the three angles of every triangle are equal to two right angles,** and since the angles FA С, С AB, BAE, are also equal to two right angles, and since F А С is equal... | |
| David Benedict - 1848 - 970 páginas
...he has not a head for the philosophy of language; and 1 say this with as liltle bad leeling as I say **that the three angles of every triangle are equal to two right angles.** " That Mr. President Beecher will be immersed in. one of the great American rivers, is now very improbable... | |
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