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The angles which one straight line makes with another upon one side of i't, are either two right angles, or are together eqval to two right angles.
Elements of Geometry: Containing the First Six Books of Euclid, with a ... - Σελίδα 17
των Euclid, John Playfair - 1853 - 317 σελίδες
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## Geometry, Plane, Solid, and Spherical, in Six Books: To which is Added, in ...

Pierce Morton - 1830 - 272 σελίδες
...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 " л л z are either two right angles, or are together equal...

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

Euclides - 1834
...straight line makes with another upon one side of it, are either two right angles, or are together equal to two right angles. Let the straight line AB make...CD, upon one side of it, the angles CBA, ABD : these shall either be two right angles, or shall together be equal to two right angles. For if the angle...

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

Euclid, Robert Simson - 1835 - 513 σελίδες
...line makes with another upon the one side of it, are either two right angles, or are together equal to two right angles. Let the straight line AB make with CD, upon one side of Book I. it, the angles CBA, ABD; these are either two right angles, v— -v*-' or are together equal...

## Library of Useful Knowledge: Geometry, plane, solid, and spherical [by ...

1835
...poles of its legs . .188 (e) The spherical angles which one arc makes with another upon one side of it, are either two right angles or are together equal to two right angles 189 (/) If two spherical arcs cut one another, the vertical or opposite angles are equal . . cor. 189...

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

Euclid - 1835 - 513 σελίδες
...one side of it, are either two right angles, or are together equal to two right angles. E i. eS. 1. Let the straight line AB make with CD, upon one side of Book I. it, the angles CBA, ABD ; these are either two right angles, v>-" V""-' or are together equal...

## The Teacher's Assistant in the "Course of Mathematics Adapted to the Method ...

1836 - 472 σελίδες
...sides of the other. XIII. The angles which one straight line makes with another upon one side of it, are either two right angles, or are together equal to two right angles. XIV. If, at a point in a straight line, two other straight lines, upon the op. posite sides of it,...

## Mathematical Problems and Examples, Arranged According to Subjects, from the ...

1836 - 335 σελίδες
...to one another. 1832 14. The angles which one straight line makes with another upon one side of it are either two right angles, or are together equal to two right angles. 1 5. Draw a straight line from a given point either without or in the circumference which shall touch...

## Elements of Plane Geometry According to Euclid

Andrew Bell - 1837 - 240 σελίδες
...straight line makes with another upon one side of it, are either two right angles, or are together equal to two right angles. Let the straight line AB make...either two right angles, or are together equal to AEA two right angles. For, if the angle CBA he equal to ABD, each of them is a right angle (Def. 10);...

## The First Six and the Eleventh and Twelfth Books of Euclid's Elements: With ...

Euclid - 1837 - 390 σελίδες
...THEOR. THE angles which one straight line makes with another upon the one side of it, are together equal to two right angles. Let the straight line AB make...upon one side of it, the angles CBA, ABD; these are together equal to two right angles. For, if the angle CBA be equal AKA to ABD, each of them (I. def....

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

John Playfair - 1837 - 318 σελίδες
...straight line makes with another upon one side of it, are either two right angles, or are together equal to two right angles. Let the straight line AB make with CD, upon one side of it the angles CBA, A BD ; these are either two right angles, or are together equal to two right angles. For, if the angle...