Αναζήτηση Εικόνες Χάρτες Play YouTube Ειδήσεις Gmail Drive Περισσότερα »
Είσοδος
 Βιβλία Βιβλία
If, at a point in a 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 same straight line.
The Elements of Euclid: Viz. the First Six Books, Together with the Eleventh ... - Σελίδα 24
των Euclid - 1810 - 518 σελίδες
Πλήρης προβολή - Σχετικά με αυτό το βιβλίο

## The Elements of Plane and Solid Geometry

Henry William Watson - 1871 - 320 σελίδες
...AEC is equal to the angle BED. PROPOSITION 13. If at a point in a straight line two straight lines on opposite sides of it make the adjacent angles together equal to two right angles, or make the vertically opposite angles equal to one another, these two straight lines shall be in one...

## Elements of Geometry, Conic Sections, and Plane Trigonometry

Elias Loomis - 1871 - 302 σελίδες
...equal to that of ihe two adjacent angles BAD, DAF B~ PROPOSITION in. THEOREM (Converse of Prop. II.). If, at a point in a straight line, two other straight lines, upon me opposite sides of it, make the adjacent angles together equal to two right angles, these two straight...

## Elements of geometry, containing books i. to vi.and portions of books xi ...

Euclides, James Hamblin Smith - 1872 - 376 σελίδες
...SUPPLEMENT of the other. Thus, in both figures, / ABD is the supplement of / ABC. PROPOSITION XIV. THEOREM. If, at a. point in a straight line, two other straight...equal to two right angles, these two straight lines must be \$n_ one and the same straight line. At the pt. B in the st. line AB let the st. lines BC, BD,...

## An Elementary Geometry

William Frothingham Bradbury - 1872 - 124 σελίδες
...; therefore the sum of all the angles at the point B is equal to four right angles. THEOREM II. 10. If at a point in a straight line two other straight lines iipon opposite sides of it make the sum, of the adjacent angles equal to two right angles, these two...

## The Acting Teacher's and Student's in Training Guide and Text Book for ...

Henry Major - 1873 - 588 σελίδες
...; but CBE, EBD, two right angles ; therefore DBA, ABC, are toei equal to two right angles. XlV. — If, at a point in a straight line, two other straight...these two straight lines shall be in one and the same straigJit line. At the point B in the straight line A AB, let the two straight lines BC, BD, / upon...

## An Elementary Geometry

William Frothingham Bradbury - 1873 - 132 σελίδες
...; therefore the sum of all the angles at the point B is equal to four right angles. THEOEEM II. 10i If at a, point in a straight line two other straight lines upon opposite sides of it make the sum of the adjacent angles equal to two right angles, these two lines...

## An Elementary Geometry and Trigonometry

William Frothingham Bradbury - 1873 - 288 σελίδες
...therefore the sum of all the angles at the point B is equal to four right angles. THEOREM II. 10« If at a point in a straight line two other straight lines upon opposite sides of it make the sum of the adjacent angles equal to two right angles, these two lines...

## Pure mathematics, Τόμος 1

Edward Atkins - 1874 - 426 σελίδες
...angles (Ax. 1). Therefore, the angles which one straight line, &c. QED Proposition 14. — Theorem. If, at a point in a straight line, two other straight...lines shall be in one and the same straight line. G'ABC+ ^ tlle P0"1t B in the straight line AB, let the two / ABD= straight lines BC, BD, upon the opposite...

## The Elements of Euclid, containing the first six books, with a selection of ...

Euclides - 1874 - 342 σελίδες
...angles (Ax. 1). Wherefore, the angles which one straight line, &c. QED PROPOSITION 14. — Theorem. If at a point in a straight line, two other straight...adjacent angles together equal to two right angles, then these two straight lines shall be in one and the same straight line. At the point B in the straight...

## Euclidian Geometry

Francis Cuthbertson - 1874 - 400 σελίδες
...produce CB to X, PROPOSITION X. If two straight lines, drawn from one extremity of a straight line on opposite sides of it, make the adjacent angles together...to two right angles, these two straight lines shall l>e in one and the same straight line. Let BC, BD drawn from B one extremity of AB make the adjacent...