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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 - Side 21
av Great Britain. Admiralty - 1846
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A Text-book of Geometrical Deductions: Book I [-II] Corresponding to ..., Bok 1

James Andrew Blaikie, William Thomson - 1891
...hi a straight line two other straight lines on opposite sides of it make adjacent angles which are together equal to two right angles, these two straight...lines shall be in one and the same straight line. 15. If two straight lines cut one another, the vertically opposite angles shall be equal. 16. If one...
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Rider Papers on Euclid: Books i and Ii, Graduated and Arranged in Order of ...

Rupert Deakin - 1891 - 79 sider
...straight line on one side of it are either two right angles or are together equal to two right angles. 14. 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...
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A Text-book of Geometrical Deductions: Book I [-II] Corresponding to ..., Bok 1

James Andrew Blaikie, William Thomson - 1891
...straight lines meet in a point, the angles formed shall be together equal to four right angles. i 14. If at a point in a straight line two other straight lines on opposite sides of it make adjacent angles which are together equal to two right angles, these two...
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The Elements of Euclid: Viz. the First Six Books, Together with the Eleventh ...

Euclid - 1892 - 518 sider
...supplementary. PROPOSITION 14. THEOREM. If, at a point in a straight line, two otlier straight lines, on opposite sides of it, make the adjacent angles together equal to two right angles, then these two straight lines shall be in one and the same straight Kv,e. At the point B in the straight...
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The First Book of Euclid's Elements: Arranged for Beginners

Euclid, John Bascombe Lock - 1892 - 167 sider
...equal. 7. With the construction of Question 6 shew that FA bisects the angle BAC. Proposition 14. 91. 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...
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Euclid's Elements of Geometry, Bøker 1-6

Henry Martyn Taylor - 1893 - 504 sider
...produced to G and the angle IiAG bisected, the two bisecting lines are at right angles. PROPOSITION 14. 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 rigM angles, these two straight...
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Elements of Geometry, Conic Sections, and Plane Trigonometry

Elias Loomis - 1895 - 436 sider
...n consequence 3f the supposition. Prop. 3 might be enunciated thus : Hypothesis, if, at a point na straight line, two other straight lines upon the opposite sides of it make the idjacent angles together equal to two right angles, then, Conclusion, these two straight lines are...
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Euclid's Elements of Geometry, Bøker 1-6;Bok 11

Henry Martyn Taylor - 1895 - 657 sider
...produced to G and the angle BAG bisected, the two bisecting lines are at right angles. PROPOSITION 14. 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...
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Report of the Secretary for Public Instruction ...

Queensland. Department of Public Instruction - 1897
...produced in order, all the exterior angles so formed are together equal to four right angles. 18 4. If at a point in a straight line, two other straight lines, on opposite sides of it, make tlie adjacent angles togethercqii.il to two right nn^lis, then these...
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Mathematics: Mechanic's bids and estimates. Mensuration for beginners. Easy ...

Seymour Eaton - 1899 - 340 sider
...; therefore the two angles ABC and ABD must be equal to two right angles. PROPOSITION 14. THEOREM. 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...
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