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 Cushing & Jewett, J. Robinson printer, 1822 - 326 páginas |
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Página 27
... - circles ; and is double the radius , as AB or DE , fig . 8 . 17. Parallel lines are such as are every where equi - distant from each other , as AB , CD . fig . 9 . A fig . 9 . R 18. A figure is a space bounded by a line GEOMETRY . 27.
... - circles ; and is double the radius , as AB or DE , fig . 8 . 17. Parallel lines are such as are every where equi - distant from each other , as AB , CD . fig . 9 . A fig . 9 . R 18. A figure is a space bounded by a line GEOMETRY . 27.
Página 29
... 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 quadri- lateral 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 quadri- lateral figure . 29. Quadrilateral figures whose opposite sides are parallel ...
Página 32
... 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 36
... parallel to CD , they may be con- sidered as one broad line , crossed by another line , as GH ; ( then by the last theo . ) GEB⇒CFH , and AEG = EFD . 2. Also GEB - AEF , and CFI EFD , but GEB = CFI ( by part 1. of this theo ...
... parallel to CD , they may be con- sidered as one broad line , crossed by another line , as GH ; ( then by the last theo . ) GEB⇒CFH , and AEG = EFD . 2. Also GEB - AEF , and CFI EFD , but GEB = CFI ( by part 1. of this theo ...
Página 37
... parallel to AB ; then since BD cuts the two parallel lines BA , CE ; the angle ECD = B ( by part 3. of the last theo . ) and again , since AC cuts the same parallels , the angle ACE = A ( by part 2. of the last . ) Therefore ECD + ACE ...
... parallel to AB ; then since BD cuts the two parallel lines BA , CE ; the angle ECD = B ( by part 3. of the last theo . ) and again , since AC cuts the same parallels , the angle ACE = A ( by part 2. of the last . ) Therefore ECD + ACE ...
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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 ABCD acres altitude Answer base bearing blank line centre chains and links chord circle circumferentor Co-secant co-sine Co-tang column compass contained cyphers decimal decimal fraction difference Dist 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 measure meridian distance multiplied needle number of degrees object off-sets opposite parallel parallelogram perpendicular piece of ground plane polygon Portmarnock PROB proportion protractor quotient radius right angles right line scale of equal SCHOLIUM secant second station sect semicircle side sights sine square root stationary distance stationary line sun's suppose survey taken tang tangent thence theo theodolite THEOREM thro triangle ABC trigonometry true amplitude true azimuth two-pole chains vane variation whence