| Robert Simson - Trigonometry - 1827 - 513 pages
...of any quadrilateral .figure inscribed in a circle, are together equal to two right angles. 1 20. 3. **Let ABCD be a quadrilateral figure in the circle ABCD; any two of its opposite angles** shall together be equal to two right angles. Join AC, BD : and because the three angles of every •32.1.... | |
| Isaac Taylor - Bible - 1827 - 322 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 - 256 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... | |
| Peter Nicholson - Masonry - 1828 - 272 pages
...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 - Apologetics - 1832 - 534 pages
...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 ;... | |
| Charles Pettit McIlvaine - Apologetics - 1832 - 534 pages
...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... | |
| Edward Shaw - Architecture - 1832 - 244 pages
...straight lines AF and BD, and consequently making the angle at G equal to the 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... | |
| Methodist Church - 1832 - 510 pages
...There are some, of which we can say that we know them ; others, that we believe them. We know that **the three angles of every triangle are equal to two right angles.** We do not doubt that there is such a country as England, and that such a king as Henry VIII. formerly... | |
| John Mitchell Mason - Theology - 1832 - 458 pages
...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 phantoms ;... | |
| John Playfair - Euclid's Elements - 1833 - 333 pages
...PROP. XXII. THEOR. The opposite angles of any quadrilateral figure described in a circle, are together **equal to two right angles. Let ABCD be a quadrilateral figure in the circle** A BCD ; any two of its opposite angles are toge'ther equal to two right angles. Join AC, BD. The angle... | |
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