 | Seymour Eaton - 1899 - 362 pages
...; 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... | |
 | Manitoba. Department of Education - Education - 1900 - 580 pages
...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... | |
 | Henry Sinclair Hall, Frederick Haller Stevens - Euclid's Elements - 1900 - 330 pages
...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... | |
 | 1902 - 482 pages
...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... | |
 | 1902 - 170 pages
...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... | |
 | American School (Chicago, Ill.) - Engineering - 1903 - 392 pages
...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... | |
 | Euclid - Euclid's Elements - 1904 - 488 pages
...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... | |
 | 1906 - 818 pages
...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... | |
 | Henry Sinclair Hall - 1908 - 286 pages
...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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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. 
