The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skilful Practice of this ArtJ.J. Harper, 1828 - 435 páginas |
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Página 38
... 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 through 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 through the centre , and terminating in opposite points of ...
Página 39
... radius is . 17. A chord is a right line drawn from one end of an arc or arch ( that is , any part of the ... radius ; hence it is plain that the radius CD is the greatest possible sine , and thence is called the whole sine . Since the ...
... radius is . 17. A chord is a right line drawn from one end of an arc or arch ( that is , any part of the ... radius ; hence it is plain that the radius CD is the greatest possible sine , and thence is called the whole sine . Since the ...
Página 42
... 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 perpendicular to another , at ...
... 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 perpendicular to another , at ...
Página 50
... radius . Thus in the circle AEBD , if the arc AEB be an arc of 60 degrees , and the chord AB be drawn : then AB = CB = AC . In the triangle ABC , the angle ACB is 60 degrees , being mea- sured by the arc AEB ; therefore the sum of the ...
... radius . Thus in the circle AEBD , if the arc AEB be an arc of 60 degrees , and the chord AB be drawn : then AB = CB = AC . In the triangle ABC , the angle ACB is 60 degrees , being mea- sured by the arc AEB ; therefore the sum of the ...
Página 51
... radius of the circle ABC is to the radius of the circle a bc ; ( for the greater the radius is , the greater is the circle described by that radius ; and consequently the greater any parti- cular arc of that circle is , so the chord ...
... radius of the circle ABC is to the radius of the circle a bc ; ( for the greater the radius is , the greater is the circle described by that radius ; and consequently the greater any parti- cular arc of that circle is , so the chord ...
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Términos y frases comunes
ABCD acres altitude Answer arch base bearing centre chains and links circle circumferentor Co-sec Co-tang column compasses contained cube root decimal difference of latitude Dist divided divisions divisor draw east Ecliptic edge EXAMPLE feet field-book figure four-pole chains given angle given number half the sum height Hence Horizon glass hypothenuse inches instrument length logarithm measure Meridian Altitude meridian distance method multiplied natural co-sine natural number natural sine Nonius number of degrees object observed off-sets opposite parallel parallelogram perches perpendicular plane prob PROBLEM proportional protractor Quadrant quotient radius rhombus right angles right line Secant sect semicircle Sextant side square root station subtract Sun's survey taken Tang tangent theo theodolite THEOREM trapezium triangle ABC trigonometry two-pole chains vane versed sine vulgar fraction whence