| Frederick Beasley - 1822
...in many cases? I retrace in my memory all the proofs by which Euclid demonstrates that proposition, **that the three angles of every triangle, are equal to two right angles.** In this case, do I not by memo»y revive every idea which enters into the demonstration? But the definition... | |
| Robert Hamilton Bishop - 1824 - 420 páginas
...our present comprehension, and its being contrary to the first principles of reason. The proposition **that the three angles of every triangle are equal to two right angles,** is one absolutely beyond the comprehension of the illiterate hushnndman; is it therefore not true!... | |
| William Thompson - 1824 - 600 páginas
...when applied to one out of a class or of a thousand, not able to understand, when properly explained, **that " the three angles. of every triangle are equal to two right angles."** Till this fundamental error and vice in education, the presuming to teach opinions instead of truth,... | |
| Euclides - 1826
...equal to two right angles. " 32.i. it are equal* to two right angles ; join AD, вс. Therefore because **the three angles of every triangle are equal to two right angles,** the angles CAB, ABC, CBA, are equal to two right angles. But the Let ABDC be a circle, and ABDC a quadrilateral... | |
| 1826 - 660 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,** than it is to all mankind, that justice and mercy excel tyranny and oppression. 6. Another desolating... | |
| Euclid, Phillips - 1826 - 180 páginas
...opposite angles of • 52. i. it are equal" to two right angles ; join AD, вс. Therefore because **the three angles of every triangle are equal to two right angles,** the angles CAB, ABC, CBA, are equal to two right angles. But the '• Zi.3. angle ABC is equal b to... | |
| Isaac Taylor - 1827 - 256 páginas
...exhibited 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 angles,** an actual measurement of lines, or the placing of two pieces of card one over the other, would end... | |
| Isaac Taylor - 1827
...exhibited 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 angles,** an actual measurement of lines, or the placing of two pieces of card one over the other, would end... | |
| Peter Nicholson - 1828
...straight lines AF and BD, and consequently making the angle at G equal to the A angle FAC ; and since **the three angles of every triangle are equal to two right angles,** and since the angles FAC, CAB, BAE, are also equal to two right angles, and since FAC is equal to the... | |
| Charles Pettit McIlvaine - 1832 - 526 páginas
...certainty. In mathematical reasoning, our knowledge is greater than our ignorance. When you have proved **that the three angles of every triangle are equal to two right angles,** there is an end of doubt, because there are no materials for ignorance to work up into phantasms; but... | |
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