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 27
... side = 5 , or 0.1 ; And , erecting the perpendiculars BD , bd ; half the sum of the spaces AD and Ad will be = 0.1+ + + and the half diff . - 0.001 0.00001 0.0000001 5 & c . 7 4 + + & c . 8 0.01 0.0001 0.000001 0.00000001 Which reduced ...
... side = 5 , or 0.1 ; And , erecting the perpendiculars BD , bd ; half the sum of the spaces AD and Ad will be = 0.1+ + + and the half diff . - 0.001 0.00001 0.0000001 5 & c . 7 4 + + & c . 8 0.01 0.0001 0.000001 0.00000001 Which reduced ...
Página 38
... side , but make the angles ADC , CDB on each side equal to each other , then those angles are called right angles , and the line CD a perpendicular . 11. An obtuse angle is that which is wider or greater than a right one , as the angle ...
... side , but make the angles ADC , CDB on each side equal to each other , then those angles are called right angles , and the line CD a perpendicular . 11. An obtuse angle is that which is wider or greater than a right one , as the angle ...
Página 41
... sides ; and 2d , to its angles . 33. In respect to its sides it is either equilateral , having the three sides equal ... side may be called the base , and the other two the sides . 40. The perpendicular height of a triangle is a line ...
... sides ; and 2d , to its angles . 33. In respect to its sides it is either equilateral , having the three sides equal ... side may be called the base , and the other two the sides . 40. The perpendicular height of a triangle is a line ...
Página 42
... sides are called polygons ; if the sides are all equal to each other , they are called regular polygons . They sometimes are named from the number of their sides , as a five - sided figure is called a pentagon , one of six sides a ...
... sides are called polygons ; if the sides are all equal to each other , they are called regular polygons . They sometimes are named from the number of their sides , as a five - sided figure is called a pentagon , one of six sides a ...
Página 43
... side of a right line ; all the angles made by these lines will be equal to two right angles . 2. And all the angles which can be made about a point , will be equal to four right angles . THEOREM II . PL . 1. fig . 21 . GEOMETRICAL ...
... side of a right line ; all the angles made by these lines will be equal to two right angles . 2. And all the angles which can be made about a point , will be equal to four right angles . THEOREM II . PL . 1. fig . 21 . GEOMETRICAL ...
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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