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If, at a point in a straight line, two other straight lines, on the opposite sides of it, make the adjacent angles together equal to two right angles, these two straight lines shall be in one and the same straight line.
Elements of geometry, based on Euclid, book i - Page 24
by Edward Atkins - 1877

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

Euclid - Geometry - 1810 - 554 pages
...line, two other straight lines, upon the opposite sides of it, make the adjacent ' angles together equal to two right angles, these two straight lines...straight line. At the point B in the straight line AB,lctthetwostraightlines BC, BD upon the opposite sides of AB, make theadjacent angles ABC, ABD equal...

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

Euclides - 1814 - 560 pages
...straight line, two other straight lines, upon the opposite sides of it, make the adjacent angles together equal to two right angles, these two straight lines shall be in one and the samestraight line. At the point B in the straight line AB, let the two straight lines BC, BD upon the...

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

Peter Nicholson - Mathematics - 1825 - 1046 pages
...straight line, two other straight lines, upon the opposite sides of it, make the adjacent angles, together equal to two right angles, these two straight lines...be in one and the same straight line. At the point В in the straight line AB, let the two straight lines BC, BD upon the opposite sides of AB, make the...

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

John Playfair - Circle-squaring - 1826 - 326 pages
...sides of it, make the adjaeent angles together equal to two right angles, these two straight lines are in one and the same straight line. At the point B...two straight lines BC, BD upon the opposite sides of.AB, make the adjaeent angles ABC, ABD equal together to two right angles. BD is in the same straight...

## Geometry, Plane, Solid, and Spherical, in Six Books: To which is Added, in ...

Pierce Morton - Geometry - 1830 - 584 pages
...if the adjacent angles, which one straight line makes with two others at the same point, be together equal to two right angles, these two straight lines shall be in one and the same straight line. Let the straight line AB make with CD upon one side of it, the adjacent angles А В С, ABD : these...

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

John Playfair - Euclid's Elements - 1832 - 358 pages
...sides of it, make the adjacent angles together equal to two right angles, these two straight lines are in one and the same straight line. At the point B...straight lines BC, BD upon the opposite sides of AB, make theadjacentangles ABC, ABD equal together to two right angles. BD is in the same straight line with...

## Geometry Without Axioms; Or the First Book of Euclid's Elements. With ...

Thomas Perronet Thompson - Euclid's Elements - 1833 - 168 pages
...opposite sides of it, make the adjacent angles together equal to two right angles; those two other straight lines shall be in one and the same straight...line. At the point B in the straight line AB, let the straight lines BD, BC, on the opposite sides of AB, make .\ the adjacent angles ABC, ABD together equal...

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

Euclides - 1834 - 518 pages
...upon the opposite sides of it, make the adjacent angles together equal to two right angles, these Iwo straight lines shall be in one and the same straight...let the two straight lines BC, BD upon the opposite side of AB, make the adjacent angles ABC, ABD equal together to two right angles : BD shall be in the...