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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.
A Treatise on Surveying, Containing the Theory and Practice: To which is ... - Page 26
by John Gummere - 1814 - 346 pages

Natural philosophy for beginners

Isaac Todhunter - 1877 - 442 pages
...angle ABC is equal to the angle ABD each of them is a right angle, and AB is perpendicular to DC. 14. Parallel straight lines are such as are in the same...being produced ever so far both ways do not meet. 15. A triangle is a figure formed by three straight lines. If one of the angles of the triangle is...

Natural Philosophy for Beginners: With Numerous Examples, Part 1

Isaac Todhunter - Philosophy - 1877 - 452 pages
...angle ABC is equal to the angle ABD each of them is a right angle, and AB is perpendicular to DC. 1 4. Parallel straight lines are such as are in the same...and which being produced ever so far both ways do uot meet. 15. A triangle is a figure formed by three straight lines. If one of the angles of the triangle...

Elements of Geometry, Conic Sections, and Plane Trigonometry

Elias Loomis - Conic sections - 1877 - 458 pages
...and BCE are together equal to two right angles, then ACE is the supplement of BCE. . • •*: B 24. Parallel straight lines are such as are in the same plane, and which, being produced ever 1> so far both ways, do not meet, as AB, CD. 25. A rectilineal figure, or polygon, is a portion of...

The elements of plane geometry, from the Sansk. text of Ayra Bhatta, ed. by ...

Āryabhaṭa - 1878 - 100 pages
...sides equal and all its angles right angles. XXIII. Parallel straight lines are such as are in the samo plane, and which being produced ever so far both ways do not meet. XXIV. A parallelogram is a four-sided figure of •which the opposite sides are parallel, aud the diagonal...

Elementary Geometry ...

James Maurice Wilson - 1878 - 450 pages
...Enunciate the centra-positives of Theorems 9 and 18. SECTION III. PARALLELS AND PARALLELOGRAMS. Def. 35. Parallel straight lines are such as are in the same plane and being produced to any length both ways do not meet. Axiom 5. Two straight lines that intersect one...

The Melbourne Review, Volume 3, Issues 9-12

1878 - 500 pages
...produced, they are said to make an angle with each other, or to contain or to include an angle." " Parallel straight lines are such as are in the same plane, and do not meet, however far produced." We should prefer to say that " an angle is the measure of the difference...

Queen's scholarship examination. Amner's eight years' scholarship questions ...

Joseph Wollman - 1879 - 120 pages
...different planes may not meet however far they may be produced ; therefore the complete definition is — parallel straight lines are such as are in the same...being produced ever so far both ways, do not meet SECTION II. 1. If the equal sides of an isosceles triangle be produced, the angles on the other side...

Euclid, books i. & ii., with notes, examples, and explanations, by a late ...

Euclides - 1879 - 146 pages
...trapeziums. [Four-sided figures which have two opposite sides parallel are often called trapezoids.] 35. Parallel straight lines are such as are in the same...being produced ever so far both ways do not meet. 36. A parallelogram is a four-sided figure, of which the opposite sides are parallel. 37. The diameter...