 | John Playfair - Euclid's Elements - 1842 - 332 pages
...nor its angles right angles. 29. All other four sided figures besides these, are called trapeziums. 30. Parallel straight lines are such as are in the...being produced ever so far both ways, do not meet. POSTULATES. 1. LET it be granted that a straight line may be drawA from any one point to any other... | |
 | Euclides - 1842 - 316 pages
...sides equal to one another, but all its sides are not equal, nor its angles right angles. XXXIV. XXXV. Parallel straight lines are such as are in the same...being produced ever so far both ways, do not meet. (A.) A trapezium having two, only, of its sides parallel to one another is now called a trapezoid.... | |
 | John Bonnycastle - Measurement - 1842 - 318 pages
...quadrilateral, whose sides are ill equal, but its angles not right angles.* 35. Parallel right line* are such as are in the same plane, and which being produced ever so far both ways, do not meet. 36. A parallelogram is a quadrilateral whose opposite sides are parallel. / 7 ยป ThU figure, by working... | |
 | William Pease - Geometry - 1843 - 80 pages
...angles at the extremities of each of its parallel sides equal, or all its angles may be unequal. XXXV. Parallel straight lines are such as are in the same...being produced ever so far both ways, do not meet. Curved lines are also parallel, when in the same plane, and kept at a given radiating distance throughout.... | |
 | Philip Kelland - Algebra - 1843 - 168 pages
...parallelograms, which Euclid could not do, inasmuch as he had not laid down the doctrine of parallels. 32. Parallel straight lines are such as are in the same plane, and being produced ever so far, do not meet. Or thus : Parallel straight lines are such as are in the same... | |
 | John Playfair - Euclid's Elements - 1844 - 338 pages
...nor its angles right angles. 29. All other four sided figures besides these, are called trapeziums. 30. Parallel straight lines are such as are in the...being produced ever so far both ways, do not meet. POSTULATES. 1. LET it be granted that a straight line may be drawn from any one point to any other... | |
 | Euclid - Geometry - 1845 - 218 pages
...angles right angles. xxxiy. All other four-sided figures besides these, are called Trapeziums. XXXV. Parallel straight lines, are such as are in the same...being produced ever so far both ways, do not meet. POSTULATES. I. Let it be granted that a straight line may be drawn from any one point to any other... | |
 | Euclid, James Thomson - Geometry - 1845 - 382 pages
...An acute angle is that which is less than a right angle. 11. Parallel straight lines are those which are in the same plane, and which, being produced ~~~ ever so far both ways, do not meet. 12. Afyurt is that which is enclosed by one or more boundaries. 13. Rectilineal or rectilinear figures... | |
 | Euclides - 1845 - 546 pages
...angles right angles. XXXIV. All other four-sided figures besides these, are called Trapeziums. XXXV. Parallel straight lines are such as are in the same plane, and whic being produced ever so far both ways, do not meet. A. A parallelogram is a four-sided figure,... | |
 | Euclid, John Playfair - Euclid's Elements - 1846 - 334 pages
...nor its angles right angles. 29. All other four sided figures besides these, are called trapeziums. 30. Parallel straight lines are such as are in the...being produced ever so far both ways, do not meet. POSTULATES. 1. LET it be granted that a straight line may be drawn from any one point to any other... | |
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Parallel straight lines are such as are in the same plane, and which being produced ever so far both ways, do not meet. 
