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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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Science Examination Papers

...which costs 25/. 14*. 6d. a ton. NB 1 metre=3 • 28092 ft., 1 kilogramme = 2-2046 lbs. (10.) B. 7. 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, show that these...
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Report of the Department of Education for the Year ...

...triangles will be equal in all respects, and name the proposition in which each case is proved. 3. 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, then these two...
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A Text-book of Euclid's Elements for the Use of Schools, Books I.-IV., Bok 1

Henry Sinclair Hall, Frederick Haller Stevens - 1900 - 304 sider
...are supplementary ; and also that the angles AOY and BOY are supplementary. 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, then these two...
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Annual Report of the Commissioners ..., Volum 68

1902
...Describe a parallelogram equal to a given triangle and having one of its angles equal to a given angle. 4. 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, then these...
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Calendar, for the Year ...

1902
...line on one side of it, are either two right angles or are together equal to two right angles ; and, if at a point in a straight line, two other straight lines, on opposite sides of it, make adjacent angles together equal to two right angles, these two straight...
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Mathematics, mechanics, heat

...and DO E. Hence, the sum of the angles AOB, BOC, COD, and DOA = four right angles. THEOREn II. 34. 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 lines...
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A Text-book of Euclid's Elements for the Use of Schools, Bok 1

Euclid - 1904 - 456 sider
...angles to one another. 3. Shew that the angles AOX and COY are complementary. 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, then these two...
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Annual Report of the Commissioners ..., Volum 72

1906
...CHAMBERS, District Inspector. SECTION A. 1. If at a point in a right line two other right lines on opposite sides of it make the adjacent angles together equal to two right angles, these two right lines form one continuous line. 2. If two triangles have two sides of one respectively equal...
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A School Geometry, Deler 1-4

Henry Sinclair Hall - 1908
...the same angle are equal. (ii) Complements of the same angle are equal. 11 THEOREM 2. [Euc. I. 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, then these two...
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Horses, Horsemen and Stable-management

Godfrey Bosvile - 1908 - 276 sider
...adopt them ; but in no case may algebraical symbols, such as the minus sign, and AJP, be used.] 1. 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, then these two...
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