 | Euclid - 1781 - عدد الصفحات: 552
...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 - عدد الصفحات: 462
...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 - عدد الصفحات: 374
...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... | |
 | Robert Simson - 1806 - عدد الصفحات: 546
...to the same two ; and when 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... | |
 | John Playfair - 1806 - عدد الصفحات: 320
...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... | |
 | Euclid - 1810 - عدد الصفحات: 554
...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 - عدد الصفحات: 714
...to the point of contact, shall be perpendicular to the line touching the circle. Prop. XIX. Theor. If a straight line touches a circle, and from the...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... | |
 | Peter Fleming - 1815 - عدد الصفحات: 250
...touching the circle, ... 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... | |
 | Euclides - 1816 - عدد الصفحات: 588
...that is, FC is perpendicular to DE. Therefore if a straight , . line^&c. QED D" c PROP. XIX. THEOR. IF a straight line touches a circle, and from the...line, the centre of the circle shall be in that line. Let the straight line DE touch the circle ABC in C, and from C let CA be drawn at right angles to DE... | |
 | John Playfair - 1819 - عدد الصفحات: 350
...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... 
