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 39
... radius , so is any line from the centre to the circumference : whence all radii of the same or of equal circles are equal . 15. The diameter of a circle is a right line drawn thro ' the centre , and terminating in opposite points . of ...
... radius , so is any line from the centre to the circumference : whence all radii of the same or of equal circles are equal . 15. The diameter of a circle is a right line drawn thro ' the centre , and terminating in opposite points . of ...
Σελίδα 40
... radius CD is the greatest possible sine , and thence is called the whole sine . Since the whole sine CD ( fig . 8 ... radius DC is always the sine of a quadrant , or of the fourth part of the circle BD . Sines are said to be of as many ...
... radius CD is the greatest possible sine , and thence is called the whole sine . Since the whole sine CD ( fig . 8 ... radius DC is always the sine of a quadrant , or of the fourth part of the circle BD . Sines are said to be of as many ...
Σελίδα 45
... radius , the circumference of a 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 per- pendicular to another ...
... radius , the circumference of a 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 per- pendicular to another ...
Σελίδα 56
... hypothenuse and giv- ́en side , will be the required side . THEO . XV . PL . 1. fig . 33 . In all circles the chord of 60 degrees is always equal in length to the radius . Thus in the circle AEBD , if the arc AEB 56 GEOMETRICAL.
... hypothenuse and giv- ́en side , will be the required side . THEO . XV . PL . 1. fig . 33 . In all circles the chord of 60 degrees is always equal in length to the radius . Thus in the circle AEBD , if the arc AEB 56 GEOMETRICAL.
Σελίδα 57
... radius of the circle ABC is to the radius of the circle a b c ; ( for the greater the radius is , the greater is the circle described by that radius ; and consequently the greater any particular arc of that circle is , so the chord ...
... radius of the circle ABC is to the radius of the circle a b c ; ( for the greater the radius is , the greater is the circle described by that radius ; and consequently the greater any particular arc of that circle is , so the chord ...
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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