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 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. First principles of Euclid: an introduction to the study of the first book ... - Σελίδα 51
των T S. Taylor - 1880
Πλήρης προβολή - Σχετικά με αυτό το βιβλίο ## 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... ## An Elementary Geometry and Trigonometry

William Frothingham Bradbury - 1873 - 292 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... ## The Acting Teacher's and Student's in Training Guide and Text Book for ...

Henry Major - 1873 - 592 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 lines, upon the opposite sides of it, make the adjacent angles together equal to two right angles, these two... ## A School Euclid. Being Books I.&II. of Euclid's Elements. With Notes ...

Euclides - 1874 - 120 σελίδες
...lines BG and BH show that the angle GBH will in each case be a right angle. PROPOSITION 14. THEOREM. If, at a point in a straight line, two other straight...of it, make the adjacent angles together equal to twi rigid angles, these two straight lines shall be in one and the same straight line. * ' • At the... ## 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 equal 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... ## Pure mathematics, Τόμος 1

Edward Atkins - 1874 - 424 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, upon the opposite sides of it, make the adjacent angles together equal to two right angles, these two... ## 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 lines upon the opposite sides of it, make the adjacent angles together equal to two right angles, then these... ## Elements of geometry, containing books i. to vi.and portions of books xi ...

Euclides, James Hamblin Smith - 1876 - 382 σελίδες
...ABC. PROPOSITION XIV. THEOREM. If, at a point in a straight line, two other straight Unes, upon flu', opposite sides of it, make the adjacent angles together equal to two right angles, these two straight lines must be in one and the same straight line. At the pt. B in the st. line AB... ## The Teachers' assistant and pupil teachers' guide, Τόμος 1

1876 - 400 σελίδες
...children of Henry L 3. How was the Great Charter obtained ? Mention some of its provisions. EUCLID. — 1. 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... ## The Pupil teacher, a monthly educational journal. H. Major, ed

Henry Major - 1876 - 784 σελίδες
...trapezium. What is the hypothesis, and what is the conclusion in the enunciation of the 5th proposition ? 2. 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, then these...