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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. "
First principles of Euclid: an introduction to the study of the first book ... - Σελίδα 51
των T S. Taylor - 1880
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Euclid's Elements of Geometry, Βιβλία 1-6

Henry Martyn Taylor - 1893 - 486 σελίδες
...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...

Euclid's Elements of Geometry, Βιβλία 1-6;Βιβλίο 11

Henry Martyn Taylor - 1895 - 708 σελίδες
...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...

Report of the Secretary for Public Instruction ...

Queensland. Department of Public Instruction - 1897 - 446 σελίδες
...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 two...

Science Examination Papers

Great Britain. Education Department. Department of Science and Art - 1899 - 348 σελίδες
...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...

Mathematics: Mechanic's bids and estimates. Mensuration for beginners. Easy ...

Seymour Eaton - 1899 - 362 σελίδες
...; 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...

A Text-book of Euclid's Elements for the Use of Schools. Books I ..., Βιβλίο 1

Euclid, Henry Sinclair Hall, Frederick Haller Stevens - 1900 - 330 σελίδες
...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 straight...

Report of the Department of Education for the Year ...

Manitoba. Department of Education - 1900 - 558 σελίδες
...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 straight...

Annual Report of the Commissioners ..., Τόμος 68

1902 - 482 σελίδες
...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...adjacent angles together equal to two right angles, then these two straight lines are in one and the same straight line. SECTION B. 5. If two triangles...

Calendar, for the Year ...

1902 - 170 σελίδες
...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 lines...

Mathematics, mechanics, heat

American School (Chicago, Ill.) - 1903 - 390 σελίδες
...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...




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