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 σελίδες |
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Σελίδα 9
... parts , this number is called the denominator ; and if we chuse to take any number of such parts less than the whole , this is called the numerator of a fraction . The numerator in the vulgar form is always wrote over 2 THE ...
... parts , this number is called the denominator ; and if we chuse to take any number of such parts less than the whole , this is called the numerator of a fraction . The numerator in the vulgar form is always wrote over 2 THE ...
Σελίδα 11
... less , while the denomination of it increa- ses , and becomes so many times greater , by prefixing one , or two , or three cyphers to it ; and that any number of cyphers , before an integer , or after a de- cimal fraction , has no ...
... less , while the denomination of it increa- ses , and becomes so many times greater , by prefixing one , or two , or three cyphers to it ; and that any number of cyphers , before an integer , or after a de- cimal fraction , has no ...
Σελίδα 26
... C D 12. An obtuse angle is that which is greater than a right one , as the angle ADE , fig . 7. and an acute angle is less than a right one , as EDB , fig . 7 . 13. Acute and obtuse angles in general are call- ed 26 GEOMETRY .
... C D 12. An obtuse angle is that which is greater than a right one , as the angle ADE , fig . 7. and an acute angle is less than a right one , as EDB , fig . 7 . 13. Acute and obtuse angles in general are call- ed 26 GEOMETRY .
Σελίδα 40
... less than a semicircle , therefore half the arc AB , or the angle ADB is less than half a semicircle , and consequently less than a right angle . fig . 26 . Cor . 4. An angle in a segment less than a semicircle , is greater than a right ...
... less than a semicircle , therefore half the arc AB , or the angle ADB is less than half a semicircle , and consequently less than a right angle . fig . 26 . Cor . 4. An angle in a segment less than a semicircle , is greater than a right ...
Σελίδα 43
... less , which is absurd , whence IK is not parallel ; and the like we can prove of all other lines but AB ; therefore AB is parallel to CD . Q. E. D. THEOREM XII . If two equal and parallel lines AB , CD be joined by two other lines AD ...
... less , which is absurd , whence IK is not parallel ; and the like we can prove of all other lines but AB ; therefore AB is parallel to CD . Q. E. D. THEOREM XII . If two equal and parallel lines AB , CD be joined by two other lines AD ...
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Συχνά εμφανιζόμενοι όροι και φράσεις
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