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 Joseph Cushing, 1816 - 472 páginas |
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Página 31
... radius , or any line from the centre to the circum- ference ; whence all radii of the same , or of equal cir- cles are equal . 16. The diameter of a circle is a right line drawn thro ' the centre , and terminated on both sides by the ...
... radius , or any line from the centre to the circum- ference ; whence all radii of the same , or of equal cir- cles are equal . 16. The diameter of a circle is a right line drawn thro ' the centre , and terminated on both sides by the ...
Página 35
... 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 possibly for one right line to be perpendicular to an- other ...
... 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 possibly for one right line to be perpendicular to an- other ...
Página 50
... radius . fig . 38 . 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 . fig . 33 . C B In the triangle ABC , the angle ACB is 60 degrees , being measured by the arc AEB ...
... radius . fig . 38 . 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 . fig . 33 . C B In the triangle ABC , the angle ACB is 60 degrees , being measured by the arc AEB ...
Página 51
... radius of the circle ABC is to be the radius of the circle , a b c ; ( for the greater the radius is , the greater is the circle described by that radius ; and conse- quently the greater any particular arc of that circle is , so the ...
... radius of the circle ABC is to be the radius of the circle , a b c ; ( for the greater the radius is , the greater is the circle described by that radius ; and conse- quently the greater any particular arc of that circle is , so the ...
Página 58
... radius CB ; BH an arc of it , and DH its complement ; HL or FC the sine , FH or CL its co - sine ; BK its tan- gent ... radius is to the tangent . 2. Radius is to the tangent of an arc , as the co - sine of it is to the sine . 3. The ...
... radius CB ; BH an arc of it , and DH its complement ; HL or FC the sine , FH or CL its co - sine ; BK its tan- gent ... radius is to the tangent . 2. Radius is to the tangent of an arc , as the co - sine of it is to the sine . 3. The ...
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A Treatise of Practical Surveying: Which is Demonstrated From Its First ... Robert Gibson Sin vista previa disponible - 2021 |
Términos y frases comunes
20 perches 50 Dist ABCD acres altitude annexed Answer base bearing bisect blank line centre chains and links chord circle circumferentor Co-secant Secant Co-sine Co-tang column contained cyphers decimal decimal fraction Dep Lat difference 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 magnetical measure meridian distance multiplied needle number of degrees object off-sets parallel parallelogram perpendicular piece of ground plane Portmarnock PROB proportion protractor quotient radius right angles right line scale of equal SCHOLIUM sect semicircle side sights sine square root stationary distance sun's suppose survey taken tance Tang tangent thence theo theodolite THEOREM thro trapezium triangle ABC trigonometry true amplitude true azimuth two-pole chains vane variation whence