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 Βιβλία Βιβλία
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 Euclid: Viz. the First Six Books, Together with the Eleventh ... - Σελίδα 24
των Euclid - 1810 - 518 σελίδες
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## The First Book of Euclid's Elements: Arranged for Beginners

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...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...

## 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...

## Elements of Geometry, Conic Sections, and Plane Trigonometry

Elias Loomis - 1895 - 450 σελίδες
...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...

## 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...

## 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...

## 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...

## 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...

## 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...

## 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...