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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 Geometry, Symbolically Arranged - Page 21
by Great Britain. Admiralty - 1846

## Queen's scholarship examination. Amner's eight years' scholarship questions ...

Joseph Wollman - 1879 - 120 pages
...point draw a straight line which shall make equal angles with two straight lines given in position. 31. If at a point in a straight line two other straight lines on opposite sides of it make the adjacent angles together equal to two right angles, these two straight...

## The Bombay university calendar, Volume 1

Bombay city, univ - 1880 - 750 pages
...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...lines shall be in one and the same straight line. ABCD is a parallelogram whose diagonals meet in O. Show that if the parallelograms AOBP, DOCQbe completed,...

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

Isaac Todhunter - Euclid's Elements - 1880 - 426 pages
...T> F BC K. H And because at the point H in the straight line GH, the two straight lines KH, HM, on the opposite sides of it, make the adjacent angles together equal to two right angles, KH is in the same straight line with HM. [I. 14. And because the straight line HG meets the parallels...

## The pupil teachers' handy mathematical and grammatical question-book, with key

Pupil teachers - 1880 - 1516 pages
...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 two straight lines...

## An Elementary Geometry: Plane, Solid and Spherical

William Frothingham Bradbury - Geometry - 1880 - 260 pages
...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 lines...

## Euclid for beginners, books i. and ii., with simple exercises by F.B. Harvey

Euclides, Frederick Burn Harvey - Geometry - 1880 - 178 pages
...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 two straight...

## First principles of Euclid: an introduction to the study of the first book ...

T S. Taylor - 1880 - 152 pages
...(Euclid I. 14). Repeat. — The enunciation of Euc. I. 13 and Axioms 3<z and n. General Enunciation. 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, those two...

## Examination papers, and division lists, &c. [afterw.] General certificate of ...

Oxford univ, local exams - 1880 - 394 pages
...superficies, a square, a parallelogram. What is Euclid's axiom about lines which will meet when produced ? 2. 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...