A Treatise on Practical Surveying: Which is Demonstrated from Its First Principles, Wherein Every Thing that is Useful and Curious in that Art, is Fully Considered and ExplainedF. Lucas, Jun. and Joseph Cushing, 1816 - 472 páginas |
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Página 31
... called semicircles ; and is double the radius , as AB or DE , fig . 8 . 17. Parallel lines are such as are every where equidistant from each other , as AB , CD . fig . 9 . " fig . B 18. A figure is a space bounded by a line GEOMETRY . 31.
... called semicircles ; and is double the radius , as AB or DE , fig . 8 . 17. Parallel lines are such as are every where equidistant from each other , as AB , CD . fig . 9 . " fig . B 18. A figure is a space bounded by a line GEOMETRY . 31.
Página 33
... parallels have the same height , since all the perpendiculars are equal from the nature of parallel lines . 28. Any figure of four sides is called a quadrilateral figure . 29. Quadrilateral figures whose opposite sides are parallel ...
... parallels have the same height , since all the perpendiculars are equal from the nature of parallel lines . 28. Any figure of four sides is called a quadrilateral figure . 29. Quadrilateral figures whose opposite sides are parallel ...
Página 36
... parallel , be produced to- wards their nearest distance , they will intersect each other . 9. Things which mutually agree with each other , are equal . NOTES . A theorem is a proposition , wherein something is proposed to be ...
... parallel , be produced to- wards their nearest distance , they will intersect each other . 9. Things which mutually agree with each other , are equal . NOTES . A theorem is a proposition , wherein something is proposed to be ...
Página 39
... . fig . 22 If a right line cross two parallels , I as GH does AB and CD ( fig . 22. ) A E B K then , D H 1. Their external angles are equal to each other , that is , GEB CFH . = 2. The alternate angles will be equal , that is THEOREMS . 39.
... . fig . 22 If a right line cross two parallels , I as GH does AB and CD ( fig . 22. ) A E B K then , D H 1. Their external angles are equal to each other , that is , GEB CFH . = 2. The alternate angles will be equal , that is THEOREMS . 39.
Página 40
... parallel to CD , they may be consi- dered as one broad line , crossed by another line , as GH ; ( then by the last theo . ) GEB = CFH , and AEG = HFD . 2. Also GEB = AEF , and CFH - EFD ; but GEB = CFH ( by part 1. of this theo ...
... parallel to CD , they may be consi- dered as one broad line , crossed by another line , as GH ; ( then by the last theo . ) GEB = CFH , and AEG = HFD . 2. Also GEB = AEF , and CFH - EFD ; but GEB = CFH ( by part 1. of this theo ...
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A Treatise of Practical Surveying: Which is Demonstrated From Its First ... Robert Gibson Sin vista previa disponible - 2021 |
Términos y frases comunes
20 perches 50 Dist ABCD acres altitude annexed Answer base bearing bisect blank line centre chains and links chord circle circumferentor Co-secant Secant Co-sine Co-tang column contained cyphers decimal decimal fraction Dep Lat difference divided divisor draw east edge EXAMPLE feet field-book figures four-pole chains given angle half the sum height Hence hypothenuse inches instrument latitude length logarithm magnetical measure meridian distance multiplied needle number of degrees object off-sets parallel parallelogram perpendicular piece of ground plane Portmarnock PROB proportion protractor quotient radius right angles right line scale of equal SCHOLIUM sect semicircle side sights sine square root stationary distance sun's suppose survey taken tance Tang tangent thence theo theodolite THEOREM thro trapezium triangle ABC trigonometry true amplitude true azimuth two-pole chains vane variation whence