 | Liberalism (Religion) - 1813 - 596 pages
...they concurred in the plain and pre-established propositions that " two and two are four, and that the three angles of every triangle are equal to two right angles," were perfectly correct, and found every thing as it should be; " but, when each left this guide, and... | |
 | John Playfair - Circle-squaring - 1819 - 350 pages
...triangles, the four oblique angles of whJrh are equal to the three angles of the triangle, therefore the three angles of every triangle are equal to two right angles. Q, ED Though this method of treating the subject is strictly demonstrative, ;yet, as the reasoning... | |
 | Bewick Bridge - Algebra - 1821 - 648 pages
...180°. Thus, if the angle ACF is 40° 25' 35", its supplement FCB will be 139° 34' 25".* 6. The * Since the three angles of every triangle are equal to two right angles, or to 180°, it is evident that in a right-angled triangle the two acute angles must be together equal... | |
 | Frederick Beasley - Philosophy - 1822 - 584 pages
...space included between three straight lines that cut each, ever lead us on to the conclusion, that the three angles of every triangle, are equal to two right angles? Does it at all enter into the inquiry? Does it form any part of the argument? A man might long enough... | |
 | Robert Hamilton Bishop - Kentucky - 1824 - 464 pages
...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 - Economics - 1824 - 634 pages
...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 - 226 pages
...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... | |
 | Euclid - 1826 - 234 pages
...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 the... | |
 | Isaac Taylor - Bible - 1827 - 298 pages
...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 - Bible - 1827 - 290 pages
...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... | |
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When you have proved that the three angles of every triangle are equal to two right angles... 
