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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...
Pure Mathematics - Page 273
1874

## The First Six Books: Together with the Eleventh and Twelfth

Euclid - 1781 - 520 pages
...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...

## Elements of Geometry;: Containing the First Six Books of Euclid, with Two ...

John Playfair - Euclid's Elements - 1795 - 400 pages
...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...

## The Elements of Euclid: Viz. the First Six Books, with the Eleventh and ...

Alexander Ingram - Trigonometry - 1799 - 351 pages
...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...

## Elements of Geometry: Containing the First Six Books of Euclid, with a ...

John Playfair - Euclid's Elements - 1806 - 311 pages
...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...

## The Elements of Euclid: Viz. the First Six Books, Together with the Eleventh ...

Euclid, Robert Simson - Euclid's Elements - 1806 - 518 pages
...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...

## The Elements of Euclid: Viz. the First Six Books, Together with the Eleventh ...

Euclid - Geometry - 1810 - 518 pages
...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...

## Pantologia. A new (cabinet) cyclopędia, by J.M. Good, O. Gregory, and N ...

...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...

## Easy Introduction to Mathematics, Volume 2

Charles Butler - Mathematics - 1814
...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...