 | Euclid - 1781 - 552 pàgines
...3SceN. PROP. XIX. THEO R. IF a ftraight line touches a circle, and from the point of contadl: a ftraight line be drawn at right angles to the touching line, the centre of the circle fhall be in that line. Let the ftraight line DE touch the circle ABC in C, and from C let CA be drawn... | |
 | Euclid, John Playfair - 1795 - 462 pàgines
...RQ P. XIX. IF a ftraight line touches a circle, arji'dt, point of contaft a ftraight line be dravyn at right angles to the touching line, the centre of the circle fhall be in that line. • • '.••• " •• •••.:: •>•'.- i: Let the ftraight line... | |
 | Alexander Ingram - 1799 - 374 pàgines
...ED PROP. XIX. THEOR. IF a ftraight line touches a circle, and from the point of contact, a ftraight line be drawn at right angles to the touching line, the centre of the circle lhall be in that line. Let the ftraight line DE touch the circle ABC in C, and from C let CA be drawn... | |
 | John Playfair - 1806 - 320 pàgines
...one angle of a triangle be equal to the other two angles, it is a right angle. PROP. XXXII. THEOR. IF a straight line touch a circle, and from the point of contact a straight line be drawn cutting the circle, the angles -made by this line with the line which touches the circle will be equal... | |
 | Robert Simson - 1806 - 546 pàgines
...the adjacent angles are equal, they are right angles. PROP. XXXII. THEOR. IF a straight line touches a circle, and from the" point of contact a straight line be drawn cutting the circle, the angles made by this line with the line touching the circle, shall be equal... | |
 | Euclid - 1810 - 554 pàgines
...angles are equal, they are right angles. PROP. XXXII. THEOR. a 11.1. 19.3. c 31. 3. d 32. 1. e22.3. IF a straight line touch a circle, and from the point of contact a straight line be drawn cutting the circle, the angles made by this line with the line touching the circle, shall be equal... | |
 | John Mason Good - 1813 - 714 pàgines
...shall be perpendicular to the line touching the circle. Prop. XIX. Theor. If a straight line touches a circle, and from the point of contact a straight...be drawn at right angles to the. touching line, the centro of the circle shall be in that line. Prop. XX. Theor. Tin: angle at tlie centre of a circle... | |
 | Charles Butler - 1814 - 582 pàgines
...demonstration, that these three perpendiculars BE, GF, and CD intersect each other in the same point AQED 249. If a straight line touch a circle, and from the point of contact two chords be drawn, and if from the extremity of one of them, a straight line be drawn parallel to... | |
 | Peter Fleming - 1815 - 250 pàgines
...îbid. 95 26 ibid, 27 28 29 - 30 ibid. 31 ibid. 33 ibid. Page Theorem 13. If a straight line touches a circle, and from the point of contact, a straight line be drawn, cutting the circle, the angle made by this line with the first line, shall be equal to the angle in... | |
 | John Playfair - 1819 - 350 pàgines
...the same two ; and when the adjacent angles are equal, they are right angles. \ PROP. XXXII. THEOR. If a straight line touch a circle, and from the point of contact a straight line be drawn cutting the circle, the angles made by this line with the line which touches the circle, shall be equal... | |
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If a straight line touch a circle, and from the point of contact a straight line be drawn cutting the circle ; the angles which this line makes with the line touching the circle, shall be equal to the angles which are in the alternate segments of the... 
