The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skilful Practice of this ArtEvert Duyckinck, 1814 - 508 σελίδες |
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Σελίδα 38
... comprehended is called a cirele ; and the curve line described by the point B , is called the circumference or the periphery of the circle ; the fixed point C , is called its centre . 14. The describing line CB . ( fig . 8. 38 GEOMETRY .
... comprehended is called a cirele ; and the curve line described by the point B , is called the circumference or the periphery of the circle ; the fixed point C , is called its centre . 14. The describing line CB . ( fig . 8. 38 GEOMETRY .
Σελίδα 39
... circles are equal . 15. The diameter of a circle is a right line drawn thro ' the centre , and terminating in opposite points . of the circumference ; and it divides the circle and circumference into two equal parts , called semicir ...
... circles are equal . 15. The diameter of a circle is a right line drawn thro ' the centre , and terminating in opposite points . of the circumference ; and it divides the circle and circumference into two equal parts , called semicir ...
Σελίδα 40
... circle is a part thereof less than a semicircle , which is contained between two ra- dii and an arc : thus the space ... circle BD . Sines are said to be of as many degrees as the arc contains parts of 360 : so the radius being the sine ...
... circle is a part thereof less than a semicircle , which is contained between two ra- dii and an arc : thus the space ... circle BD . Sines are said to be of as many degrees as the arc contains parts of 360 : so the radius being the sine ...
Σελίδα 41
... the arc HB , or of its supplement ADH . fig . 8 . 28. The measure of a right - lined angle , is the arc of a circle swept from the angular point , and G contained between the two lines that form the angle thus GEOMETRY . 41.
... the arc HB , or of its supplement ADH . fig . 8 . 28. The measure of a right - lined angle , is the arc of a circle swept from the angular point , and G contained between the two lines that form the angle thus GEOMETRY . 41.
Σελίδα 42
... circle . 29. The sine , tangent , and secant of an arc , is also the sine , tangent , and secant of an angle whose measure the arc is thus because the arc HB is the measure of the angle HCB , and since HL is the sine , BK the tangent ...
... circle . 29. The sine , tangent , and secant of an arc , is also the sine , tangent , and secant of an angle whose measure the arc is thus because the arc HB is the measure of the angle HCB , and since HL is the sine , BK the tangent ...
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acres altitude Answer arch base bearing blank line centre chains and links circle circle of latitude circumferentor Co-sec Co-tang column compasses contained decimal Dep Lat Dep difference Dist divided divisions draw east Ecliptic edge EXAMPLE feet field-book figures fore four-pole chains geometrical series given number half the sum Horizon glass hypothenuse inches instrument Lat Dep Lat latitude length logarithm measure meridian distance multiplied Natural Co-sines natural sine Nonius number of degrees object observed off-sets opposite parallelogram perches perpendicular plane pole pole star PROB proportion protractor Quadrant quotient radius right angles right line scale of equal SCHOLIUM screw Secant sect semicircle Sextant side sights square root station stationary distance subtracted survey taken Tang tangent theo theodolite trapezium triangle ABC trigonometry vane versed sine vulgar fraction