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 σελίδες |
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Αποτελέσματα 1 - 5 από τα 65.
Σελίδα 30
... perpendicular . Fig . 7 . A Fig . 5 . B fig . 6 . E 12. An obtuse angle is that which is greater than than a right one , as the angle ADE , fig . 7. and an acute an- gle is less than a right one , as EDB , fig . 7 . 13. Acute and obtuse ...
... perpendicular . Fig . 7 . A Fig . 5 . B fig . 6 . E 12. An obtuse angle is that which is greater than than a right one , as the angle ADE , fig . 7. and an acute an- gle is less than a right one , as EDB , fig . 7 . 13. Acute and obtuse ...
Σελίδα 33
... perpendicular height of a triangle is a line drawn from the vertex to the base perpendicu- larly thus if the triangle ABC , be proposed , and BC be made its base , then if from the vertex A the per- pendicular AD be drawn to BC , the ...
... perpendicular height of a triangle is a line drawn from the vertex to the base perpendicu- larly thus if the triangle ABC , be proposed , and BC be made its base , then if from the vertex A the per- pendicular AD be drawn to BC , the ...
Σελίδα 35
... perpendicular to an- other , at a given point or distance ; and that every mag- nitude has its half , third , fourth , & c . part . Note . Though these postulates are not always quoted , the reader will easily perceive where , and in ...
... perpendicular to an- other , at a given point or distance ; and that every mag- nitude has its half , third , fourth , & c . part . Note . Though these postulates are not always quoted , the reader will easily perceive where , and in ...
Σελίδα 38
... perpendicular to CD , then ( by def . 11. ) the angles CBA , and ABD , will be each a right angle . 2. But if EB fall slantwise on CD , then are the an- gles DBE + EBC = DBE + EBA ( = DBA ) + ABC , or to two right angles . Q. E. D. ...
... perpendicular to CD , then ( by def . 11. ) the angles CBA , and ABD , will be each a right angle . 2. But if EB fall slantwise on CD , then are the an- gles DBE + EBC = DBE + EBA ( = DBA ) + ABC , or to two right angles . Q. E. D. ...
Σελίδα 43
... perpendicular which bisects a given line , there be drawn right lines to the extremities of the given one , they with it will form an isosceles triangle . THEOREM VII . 25 . The angle BCD at the centre of a circle ABED is double the ...
... perpendicular which bisects a given line , there be drawn right lines to the extremities of the given one , they with it will form an isosceles triangle . THEOREM VII . 25 . The angle BCD at the centre of a circle ABED is double the ...
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A Treatise of Practical Surveying: Which is Demonstrated From Its First ... Robert Gibson Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2021 |
Συχνά εμφανιζόμενοι όροι και φράσεις
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