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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 ## The Elements of Euclid for the Use of Schools and Colleges: With Notes, an ...

Isaac Todhunter - 1880 - 426 σελίδες
...Wherefore, tlw angks &c. QED . \ PROPOSITION 14. THEOREM. If, at a point in a straight line, two otJier straight lines, on the opposite sides of it, make...adjacent angles together equal to two right angles, these two straight lines shall be in one and the same straight line. At the point B in the straight... ## The Bombay university calendar, Τόμος 1

Bombay city, univ - 1880 - 750 σελίδες
...of a quadrilateral form a parallelogram. 2. If, at a point in a straight linn, two other straight 10 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. ABCD is a parallelogram whose... ## The pupil teachers' handy mathematical and grammatical question-book, with key

Pupil teachers - 1880 - 1516 σελίδες
...of the bisections of the interior and exterior angles at the base are in the same straight line. 14. If at a point in a straight line two other straight lines, upon the opposite side of it, make the adjacent angles together equal to two right angles; then these... ## An Elementary Geometry: Plane, Solid and Spherical

William Frothingham Bradbury - 1880 - 260 σελίδες
...therefore the sum of all the angles at the point B is equal to four right angles. THEOREM III. 47i If at a point in a straight line two other straight lines upon opposite sides of it .make the sum of tfie adjacent angles equal to two right angles, these two... ## Euclid for beginners, books i. and ii., with simple exercises by F.B. Harvey

Euclides, Frederick Burn Harvey - 1880 - 178 σελίδες
...right side of the figure. - Ie the double angle on the left side of the figure. PROP. XIV. THEOREM. If at a point in a straight line, two other straight lines, upon opposite sides of it, make the adjacent angles together equal to two right angles, then these... ## The Cambridge Examiner, Τόμος 3

1883 - 536 σελίδες
...polygon. 2. Explain the terms : axiom, postulate, proposition, theorem, •problem, hypothesis. 3. If at a point in a straight line two other straight...adjacent angles together equal to two right angles, these two straight lines shall be in one and the same straight line. 4. ABCD is a quadrilateral, of... ## Moffatt's reprint of pupil teachers' questions, arranged by ed. of 'Papers ...

Moffatt and Paige - 1881 - 176 σελίδες
...trapezvum. What is the hypothesis, and what is the conclusion in the enunciation of the 5th proposition 1 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... ## Class lessons on Euclid

Marianne Nops - 1882 - 278 σελίδες
...DBA, ABC = Z. s CBE, EBD = two rt. L s. Wherefore the angles, &c. — QED PROPOSITION XIV., THEOREM 7. If at a point in a straight line two other straight...adjacent angles together equal to two right angles, these two straight lines shall be in one and the same straight line. At point B, in the straight line... ## The papers set at the professional preliminary examination

College of preceptors - 1882 - 528 σελίδες
...lines, parallelogram, angle in segment of a circle, rectilinear figure described about a circle. 2. If at a point in a straight line two other straight lines on the opposite sides of it m;ike the adjacent angles together equal to two right angles, these two straight lines shall be in... ## The Elements of Plane and Solid Geometry: With Chapters on Mensuration and ...

Isaac Sharpless - 1882 - 292 σελίδες
...+ABE=R+ABE, and ABD = EBD ~ABE=R- ABE. .-. (Ax. 2) ABC+ABD = 2R. 5 BD E Proposition 16. Theorem. — If at a point in a straight line, two other straight lines on opposite sides of it, make the adjacent angles equal to two right angles, these two lines are in the...