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

Euclides - 1816 - 588 pages
...ABC are together equal to two right-angles. Wherefore when a straight line, &c. QED PROP. XIV. THEOR. IF, at a point in a straight line, two other straight...and the same straight line. • At the point B in the straight line AB, let the two straight lines BC, BD upon the opposite sides of AB, make the adjacent... ## Elements of Geometry: Containing the First Six Books of Euclid: With a ...

John Playfair - 1819 - 354 pages
...Wherefore, .when a straight line, &c. Q, ED PROP. XIV. THEOR. If, at a point in a straight line, too other straight lines, upon the -opposite sides of...equal to two right angles, these two straight lines are in one and the same straight line. At the point B in the straight line AB, let the two straight... ## Pantologia. A new (cabinet) cyclopædia, by J.M. Good, O. Gregory ..., Volume 5

John Mason Good - 1819 - 740 pages
...Prop. XIV. Theor. If, at a point in a straight bit, two other straight lines, upon the opposite ¿act of it, make the adjacent angles together equal to two right angles, these two straight linei ¿all be in one and ihe .same straight line. I'rop. XV. Theor. If two straight lines cut one... ## Elements of Geometry: Containing the First Six Books of Euclid, with a ...

John Playfair - Circle-squaring - 1819 - 350 pages
...sides of it, make the adjacent, angles together equal to two right angles, these two straight lines are in one and the same straight line. At the point B in the straight line AB, let the two straight lines BC, BD upon the opposite sides of AB, make the adjacent... ## A Popular Course of Pure and Mixed Mathematics ...: With Tables of ...

Peter Nicholson - Mathematics - 1825 - 1046 pages
...together equal to two right angles. Wherefore, when a straight Kne, &c. QED Proposition XIV. Theorem. If, at a point in a straight line, two other straight...be in one and the same straight line. At the point В in the straight line AB, let the two straight lines BC, BD upon the opposite sides of AB, make the... ## Elements of Geometry: Containing the First Six Books of Euclid, with a ...

John Playfair - Circle-squaring - 1826 - 326 pages
...together equal to two right angles. \Yherefore, when a straight line, &e. QEJD. . •' PROP. XIV. THEOR. If, at a point in a straight line, two other straight lines, upon the opposite sides of it, make the adjaeent angles together equal to two right angles, these two straight lines are in one and the same... ## The Elements of Euclid: The Errors by which Theon, Or Others, Have Long ...

Robert Simson - Trigonometry - 1827 - 546 pages
...together equal -)- to two right angles. Wherefore, when a straight line, &c. QED PROP. XIV. THEOR. If , at a point, in a straight line, two other straight...one and the same straight line. At the point B in the straight line AB, let the two straight lines BC, BD upon the opposite sides of AB, make the adjacent... ## Geometry, Plane, Solid, and Spherical, in Six Books: To which is Added, in ...

Pierce Morton - Geometry - 1830 - 584 pages
...Straight lines which pass through the same two points lie in the same straight line . . . m. 4 (A) If at a point in a straight line two other straight lines upon opposite sides of it make the adjacent augles together equal to two rifcht angles these two straight... ## Elements of Geometry: Containing the First Six Books of Euclid : with a ...

John Playfair - Euclid's Elements - 1832 - 358 pages
...ABC are together equal to two right angles. Wherefore when a straight line, &c. QED PROP. XIV. THEOR. If, at a point in a straight line, two other straight...equal to two right angles, these two straight lines are in one and the same straight line. At the point B in the straight line AB, let the two straight... 