The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skilful Practice of this ArtE. Duyckinck, 1811 - 508 σελίδες |
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Αποτελέσματα 1 - 5 από τα 57.
Σελίδα 37
... length but no breadth ; as AB . fi- gures 1 and 2 . 4. The extremities of a line are points , as the extremities of the line AB are the points A and B. figures 1 and 2 . 5. A right line is , the shortest that can be drawn between any ...
... length but no breadth ; as AB . fi- gures 1 and 2 . 4. The extremities of a line are points , as the extremities of the line AB are the points A and B. figures 1 and 2 . 5. A right line is , the shortest that can be drawn between any ...
Σελίδα 56
... hypothenuse and given 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 given 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 72
... length , and between them so produced , with the chord of 60 ° from B , de- scribe the arced ; which distance e d , measured on the same line of chords , gives the quantity of the angle BAC , as required ; this is plain from def . 17 ...
... length , and between them so produced , with the chord of 60 ° from B , de- scribe the arced ; which distance e d , measured on the same line of chords , gives the quantity of the angle BAC , as required ; this is plain from def . 17 ...
Σελίδα 80
... length is usually denominated from the length of the legs when the sector is shut . Thus a sector of six inches , when the legs are close together , forms a rule of 12 inches when opened ; and a foot sector is two feet long , when ...
... length is usually denominated from the length of the legs when the sector is shut . Thus a sector of six inches , when the legs are close together , forms a rule of 12 inches when opened ; and a foot sector is two feet long , when ...
Σελίδα 85
... length of that tan- gent to the given radius . But if the secant of 28 ° 30 ′ was required ? Make the given radius ... length of the sine , tangent or secant of any degrees ; to find the length of the radius to that sine , tangent , or ...
... length of that tan- gent to the given radius . But if the secant of 28 ° 30 ′ was required ? Make the given radius ... length of the sine , tangent or secant of any degrees ; to find the length of the radius to that sine , tangent , or ...
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Συχνά εμφανιζόμενοι όροι και φράσεις
acres altitude Answer arch azimuth base bearing blank line centre chains and links chord circle circumferentor Co-sec Co-tang column compasses contained decimal difference distance line divided divisions draw east Ecliptic edge feet field-book figures fore four-pole chains geom given number half the sum Horizon glass hypothenuse inches instrument Lat Dep Lat latitude length logarithm measure meridian distance multiplied natural co-sine natural sine needle Nonius number of degrees object observed off-sets opposite parallel parallelogram pegs perches perpendicular plane pole pole star Portmarnock PROB protractor Quadrant quotient radius right angles right line scale of equal SCHOLIUM screw Secant sect Sextant side sights square station stationary distance subtract Sun's survey taken Tang tangent theo theodolite trapezium triangle ABC trigonometry two-pole chains vane versed sine vulgar fraction whence
Δημοφιλή αποσπάσματα
Σελίδα 38 - The angle in a semicircle is a right angle ; the angle in a segment greater than a semicircle is less than a right angle ; and the angle in a segment less than a semicircle is greater than a right angle.
Σελίδα 25 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; and each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds ; and these into thirds, &c.
Σελίδα 197 - RULE. From half the sum of the three sides subtract each side severally.
Σελίδα 106 - C' (89) (90) (91) (92) (93) 112. In any plane triangle, the sum of any two sides is to their difference as the tangent of half the sum of the opposite angles is to the tangent of half their difference.
Σελίδα 27 - The VERSED SINE of an arc is that part of the diameter which is between the sine and the arc. Thus BA is the versed sine of the arc AG.