 | Charles Pettit McIlvaine - Apologetics - 1832 - 534 pages
...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... | |
 | Euclides - 1834 - 518 pages
...ABCD be a quadraliteral 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 tri• 32. 1. angle are equal * to two right angles, the three angles of the triangle CAB, viz. the... | |
 | Euclid - 1835 - 540 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...Join AC, BD; and because the three angles of every tria32. 1. angle are equal" to two right angles, the three angles of the triangle CAB, viz. the angle... | |
 | 1835 - 582 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; but... | |
 | John Playfair - Geometry - 1836 - 148 pages
...PROP. XIV. THEOR. The opposite angles of any quadrilateral figure described in a circle, are together equal to two right angles. Let ABCD be a quadrilateral...because the three angles of every triangle are equal (5. 2.) to two right angles, the three angles of the triangle CAB, viz. the angles CAB, ABC, BCA are... | |
 | John Playfair - Euclid's Elements - 1836 - 488 pages
...angles of any quadrilateral figure described in a circle, are together equal to two right angles, t , Let ABCD be a quadrilateral figure in the circle ABCD...opposite angles are together equal to two right angles, a 21. 3. Join AC, BD. The angle CAB is equal a to the angle CDB, because they are in the same segment... | |
 | Andrew Bell - Euclid's Elements - 1837 - 290 pages
...XXII. THEOREM. The opposite angles of any quadrilateral figure described in a circle, are together equal to two right angles. Let ABCD be a quadrilateral...angles of every triangle are equal to two right angles (1. 32), the three angles of the triangle CAB, namely, the angles CAB, ABC, BCA, are equal to two right... | |
 | Euclid, James Thomson - Geometry - 1837 - 410 pages
...XXII. THEOR. THE opposite angles of any quadrilateral figure described in a circle, t are together equal to two right angles. Let ABCD be a quadrilateral...are together equal to two right angles. Join AC, BD. Then (III. 21.) the angles CAB.CDB are equal, because they are in the same segment BADC; and the angles... | |
 | John Playfair - Geometry - 1837 - 332 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...are together equal to two right angles. Join AC, BD. The angle CAB is equal (21. 3.) to the angle CDB, because they are in the same segment BADC, and the... | |
 | Christian, Thomas Jackson - 1837 - 314 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; but... | |
| |
The opposite angles of any quadrilateral figure described in a circle, are toe/ether equal to two right angles. Let ABCD be a quadrilateral figure in the circle ABCD : any two of its opposite angles are together equal to two right angles. 
