 | Euclides - 1834 - 518 pagina’s
...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...straight line with CB. Wherefore, if at a point, &c. >.-. ED PROPOSITION XV. THEOR Jflwo slrai"ltt lines rut one another, the vertical, or opposite, a:ig!it... | |
 | Euclid - 1835 - 540 pagina’s
...therefore BE is not in the same straight line with Hi,'. And, in like manner, it may be demonstrated, that no other can be in the same straight line with...but BD, which therefore is in the same straight line with.CB. Wherefore, " if at a point," &c. QED PROP. XV. THEOR. If two straight lines cut one another,... | |
 | John Playfair - 1835 - 336 pagina’s
...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 lina with CB. PROP. VIII. THEOR. If two straight lines cut one another, the vertical, or opposite angles... | |
 | 1835 - 684 pagina’s
...one straight line with another upon one side of it, are, together, equal to two right angles . 5 (*) If two straight lines cut one another, the vertical or opposite angles are equal . . 5 (c) All the angles which are made upon one side of a straight line at the same point... | |
 | John Playfair - 1836 - 488 pagina’s
...; therefore BE is not in the same straight line with BC. And in like manner it may he demonstrated, that no other can be in the same straight line with...straight line with CB. Wherefore, if at a point, &c. QED ,t PROP. XV. THEOR. If two straight lines cut one another, the vertical, or opposite angles are equal.... | |
 | John Playfair - 1836 - 148 pagina’s
...angles, these two straight lines shall be in the same straight line. Which was to be proved. PROP. III. THEOR. If two straight lines cut one another, the vertical or opposite angles shall lie equal. Let the two straight lines AB, CD cut one another in the point E, the angle AEC shall be... | |
 | 1836 - 488 pagina’s
...together equal to two right angles, these two straight lines are in one and the same straight line. XV. If two straight lines cut one another, the vertical, or opposite angles are equal. COR. 1. From this it is manifest, that if two straight lines cut one another, the angles... | |
 | Euclid, James Thomson - 1837 - 410 pagina’s
...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...straight line with CB. Wherefore, if at a point, &c. Cor. If, at a point in a straight line, two other straight lines meet on the opposite sides of it,... | |
 | Andrew Bell - 1837 - 290 pagina’s
...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...which, therefore, is in the same straight line with CB. PROPOSITION XT. THEOREM. If two straight lines cut one another, the vertical or opposite angles shall... | |
 | John Playfair - 1837 - 332 pagina’s
...iherefore BE is nut 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...which therefore is in the same straight line with CB. PROP. XV. THEOR. t If two straight lines cut one another, the vertical, or opposite angles are equal.... | |
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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... 
