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ABD, the less to the greater, which is impossible ; therefore BE is not in the same straight line with BC. And in like manner, it may be demonstrated, that no other can be in the same straight line with it but BD, which therefore is in the same straight...
The first two books of the Elements of Euclid, with additional figures ... - Page 34
by Euclides - 1852

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

Euclid, John Playfair - Euclid's Elements - 1795 - 462 pages
...that no other can be in the fame ftraight line with it but BD, which therefore is in the fame ftaight line with CB. Wherefore, if at a point, &c. Q^ED PROP. XV. THEO R. IF two ftraight lines cut one another, the vertical, or oppoftte angles (hall be equal. Let...

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

Alexander Ingram - Trigonometry - 1799 - 374 pages
...that no other can be in the fame ftraight line with it but BD, which therefore is in the fame ftraight line with CB. Wherefore, if at a point, &c. Q^ED PROP. XV. THEOR. IF two ftraight lines cut one another, the vertical, or oppojite, angles fliall be equal. Let the two ftraight...

## Pantologia. A new (cabinet) cyclopædia, by J.M. Good, O. Gregory ..., Volume 5

John Mason Good - 1813 - 714 pages
...to t«-o right angles, these two straight lines •hall be in one and the same straight line. Piop. XV. Theor. If two straight lines cut one another, the vertical, or opposite, angles shall be equal. Prop. XVt Theor. If one side of a triangle be produced, the exterior angle is greater than «jtherof...

## The Elements of Euclid; viz. the first six books, together with the eleventh ...

Euclides - 1814 - 560 pages
...therefore BE is not in the same straight line with BC. And, in like manner, it may be demonstrated, that no other can be in the same straight line with...in the same straight line with CB. Wherefore, if at a'point, &e. QED For, if BD be not in the same straight line with GB, let Boo' I. BE be in the same...

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

Euclides - 1816 - 588 pages
...therefore BE is not in the same straight line with BC. And, in like manner, it may be demonstrated, that no other can be in the same straight ' line with it but BD, whiph therefore is in the same straight line with CB. Wherefore, if at a point, &c. QED PROP. XV. THEOR....

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

John Playfair - 1819 - 354 pages
...therefore BE is not in the same straight line with BC. And in like manner, it may be demonstrated, that no other can be in the same straight line with...cut one another, the vertical, or opposite angles arc equal. Let the two straight lines AB, CD cut one another in the point E : the angle AEC shall be...

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

John Playfair - Circle-squaring - 1819 - 350 pages
...therefore BE is not in the same straight line with BC. And in like manner, it may be demonstrated, that no other can be in the same straight line with...Wherefore, if at a point, &c. QED PROP. XV. THEOR. //" two straight lines cut one another, the -vertical, or opposite angles are equal. Let the two straight...

## A Popular Course of Pure and Mixed Mathematics ...: With Tables of ...

Peter Nicholson - Mathematics - 1825 - 1046 pages
...therefore BE is not in the same straight line with BC. And in like manner, it may be demonstrated, that no other can be in the same straight line with it but BD, which tlterefore is in the same straight line with CB. Wherefore, if at э point, &c. Q. £. D. Proposition...