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 27
... circles are equal . 16 . The diameter of a circle is a right line drawn through the centre , and terminated on both sides by the circumference ; and it divides the circle and circumference into two equal parts called semi- circles ; and ...
... circles are equal . 16 . The diameter of a circle is a right line drawn through the centre , and terminated on both sides by the circumference ; and it divides the circle and circumference into two equal parts called semi- circles ; and ...
Σελίδα 31
... circle may be described . 4. It is also required that the equality of lines and angles to others given , be granted as possible : that it is possible for one right line to be perpendicular to another , at a given point or distance ; and ...
... circle may be described . 4. It is also required that the equality of lines and angles to others given , be granted as possible : that it is possible for one right line to be perpendicular to another , at a given point or distance ; and ...
Σελίδα 39
... circle ABED is double the an- gle BAD at the circumference , standing upon the same arc LED fig . 25 . 72 fg . 25 . BK Through the point A , and the centre C , draw the line ACE : then the angle ECD = CAD + CDA ; ( by theo . 4. ) but ...
... circle ABED is double the an- gle BAD at the circumference , standing upon the same arc LED fig . 25 . 72 fg . 25 . BK Through the point A , and the centre C , draw the line ACE : then the angle ECD = CAD + CDA ; ( by theo . 4. ) but ...
Σελίδα 40
... circle which stand on the same chord as AB , are equal to each other , for they are all measured by half the arc they stand on , viz . by half the arc AB . fig . 26 . A fig . 26 . Cor . 3. Hence an angle in a segment greater than a ...
... circle which stand on the same chord as AB , are equal to each other , for they are all measured by half the arc they stand on , viz . by half the arc AB . fig . 26 . A fig . 26 . Cor . 3. Hence an angle in a segment greater than a ...
Σελίδα 41
... circle AED , and therefore a right angle . fig . 28 . fig . 28 . E THEOREM VIII . If from the centre C of a circle ABE , there be let fall the perpendicu- lar CD on the chord AB , it will bi- sect it in the point D. fig . 29 . fig . 29 ...
... circle AED , and therefore a right angle . fig . 28 . fig . 28 . E THEOREM VIII . If from the centre C of a circle ABE , there be let fall the perpendicu- lar CD on the chord AB , it will bi- sect it in the point D. fig . 29 . fig . 29 ...
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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 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