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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.
Euclid - Page 31
by Euclid, Rupert Deakin - 1903 - 164 pages

## Euclid's Elements of Geometry, Books 1-6

Henry Martyn Taylor - 1893 - 486 pages
...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...it, make the adjacent angles together equal to two rigM angles, these two straight lines are in the same straight line. At the point B in the straight...

## Euclid's Elements of Geometry, Books 1-6; Book 11

Henry Martyn Taylor - Euclid's Elements - 1895 - 708 pages
...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...equal to two right angles, these two straight lines are in the same straight line. At the point B in the straight line AB, let the two straight lines BC,...

## Report of the Secretary for Public Instruction ...

Queensland. Department of Public Instruction - Education - 1897 - 456 pages
...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 straight lines shall be in...

## 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...adjacent angles together equal to two right angles, show that these two straight lines are in the same straight line. Equilateral triangles BAD, CAE are...

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

Seymour Eaton - 1899 - 362 pages
...right angles. And because at the point H in the straight line GH, the two straight lines KH, HM, on the opposite sides of it, make the adjacent angles together equal to two right angles, KH is in the same straight line with HM (Proposition 14). And because the straight line HG meets the...

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

Euclid, 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...adjacent angles together equal to two right angles, then these two straight lines shall be in one and the same straight line. At the point B in the straight...

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

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...adjacent angles together equal to two right angles, then these two straight lines shall be in one and the same straight 4. ABC is an equilateral triangle...

## Calendar, for the Year ...

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 lines are colinear. 2. If through...