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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Σελίδα 14
... Hence it appears , that as the value and denomination of any figure or numbers of figures in common arith- metick is enlarged , and becomes ten or an hundred , or a thousand times greater , by placing one , or 14 DECIMAL FRACTIONS .
... Hence it appears , that as the value and denomination of any figure or numbers of figures in common arith- metick is enlarged , and becomes ten or an hundred , or a thousand times greater , by placing one , or 14 DECIMAL FRACTIONS .
Σελίδα 33
... Hence all triangles between the same 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 ...
... Hence all triangles between the same 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 ...
Σελίδα 41
... = 2 right angles . Q. E. D. Cor . 1. Hence if one angle of a triangle be known , the sum of the other two is also known : for since the three angles of every triangle contain two right ones , 6 THEOREMS . 41 THEOREM IV. ...
... = 2 right angles . Q. E. D. Cor . 1. Hence if one angle of a triangle be known , the sum of the other two is also known : for since the three angles of every triangle contain two right ones , 6 THEOREMS . 41 THEOREM IV. ...
Σελίδα 43
... Hence if from any point in a 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 ...
... Hence if from any point in a 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 ...
Σελίδα 44
... Hence an angle at the circumference is mea- sured by half the arc it subtends or stands on . Cor . 2. Hence all angles at the circumference of a circle which stand on the same chord as AB , are equal to each other , for they are all ...
... Hence an angle at the circumference is mea- sured by half the arc it subtends or stands on . Cor . 2. Hence all angles at the circumference of a circle which stand on the same chord as AB , are equal to each other , for they are all ...
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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