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" Through a given point to draw a line parallel to a given straight line. Let C be the given point, and AB the given line. "
A course of geometrical drawing - Seite 12
von William Schofield Binns - 1861
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Elements of Geometry

abbé Rossignol (Jean-Joseph) - 1787 - 190 Seiten
...alternate angles r, s, are therefore equal, and confequently ''the lines BA, DC are parallel. PROP. XXI. Through a given point to draw a line parallel to a given line. Let G be the point through which it is required to draw a line parallel to the given line MF....
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Elements of Geometry, Geometrical Analysis, and Plane Trigonometry: With an ...

Sir John Leslie - 1809 - 542 Seiten
...whence the triangles AGC and BGH are equal (I. 23.), and therefore AG is equal to BG. PROP. III. PROB. Through a given point, to draw a line parallel to a given straight line. Let it be required, by a rectilineal copstruction, to draw through C a parallel to Cr In AB take any two...
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The principles of architecture, Band 1

Peter Nicholson - 1809 - 426 Seiten
...given angle into two equal angles . 6 VI. To trisect a right angle into three equal angles . 7 VII. Through a given point, to draw a line parallel to a given line . . . ,7 VIII. To divide a given line into any proposed number of equal parts . . . .8 I'KOB....
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A System of Land Surveying and Levelling: Wherein is Demonstrated ..., Band 1

Peter Fleming - 1815 - 250 Seiten
...^„,^.,v«v^,.^™..4,,.v from a given point without a straight line, 7 7. To bisect a straight line, - .... ibid. 8. Through a given point, to draw a line parallel to a given straight line, ibid. 9. Upon a straight line to construct a square, - 8 10. ' To divide a straight line into any number...
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Elements of Geometry and Plane Trigonometry: With an Appendix, and Copious ...

Sir John Leslie - 1817 - 456 Seiten
...whence the triangles AGC and BGH are equal (I. 20.), and therefore AG is equal to BG. PROP. III. PRQB. Through a given point, to draw a line parallel to a given straight line. Let it be required, by a rectilineal construction, to draw through C a straight line parallel to AB. In...
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The new practical gager

Matthew Iley - 1820 - 512 Seiten
...SECTION 1. OF DRAWING AND DIVIDING LINES. PROBLEM I. To erect a perpendicular from a given point in a given straight line. Let AB be the given line, and C the given point ia it, from which a perpendicular is to be erected. F. TO From C as a centre, with any convenient opening...
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Elements of Geometry: With Practical Applications, for the Use of Schools

Timothy Walker - 1829 - 138 Seiten
...37. We are now prepared to solve the following problem — throuyh a given point to draw a straight line parallel to a given straight line — . Let AB be the given line and F22 C the given point (fig. 22). With C as a ceatre and any convenient radius as CD, make an indefinite...
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The Mechanic's Companion: Or, the Elements and Practice of Carpentry ...

Peter Nicholson - 1832 - 424 Seiten
...bisect a given straight line - - • ibid. Prob. 6. To bisect a given angle - - - ibid. PAGE Prob. 8. Through a given point to draw a line parallel to a given right line .... -20 Prob. 9. To draw a line parallel to another at a given distance . - . . . ft. Prob....
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Annual Report of the Board of Education, Band 56

Massachusetts. Board of Education - 1893 - 504 Seiten
...supplements. 20.* When a line crosses two parallel lines, compare the alternate angles. They are equal. 21. Through a given point to draw a line parallel to a given line. 22.* Oblique lines, extending from a point in one of two perpendicular lines to points equally...
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The American House-carpenter: A Treatise Upon Architecture, Cornices and ...

Robert Griffith Hatfield - 1845 - 326 Seiten
...radius, therefore, is equal to | of a quadrant ; and this is equal to a right angle. Fig. 36. 79. — Through a given point, to draw a line parallel to a given line. Let a, (Fig. 36,) be the given point, and bc the given line. Upon any point, as d, in the line,...
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