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 Cushing & Jewett, J. Robinson printer, 1822 - 326 σελίδες |
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Σελίδα 29
... base , and the other two the sides . 27. The perpendicular height of a triangle is a line drawn from the vertex to the base perpendicularly : thus if the triangle ABC , be propos- ed , and BC be made its base , then в if from the vertex ...
... base , and the other two the sides . 27. The perpendicular height of a triangle is a line drawn from the vertex to the base perpendicularly : thus if the triangle ABC , be propos- ed , and BC be made its base , then в if from the vertex ...
Σελίδα 38
... base of the one BC , will be equal to EF , that of the other . fig . 24 . Ag . 24 . AA CE If the triangle ABC be supposed to be laid on the triangle DEF , so as to make the points A and B co- incide with D and E , which they will do ...
... base of the one BC , will be equal to EF , that of the other . fig . 24 . Ag . 24 . AA CE If the triangle ABC be supposed to be laid on the triangle DEF , so as to make the points A and B co- incide with D and E , which they will do ...
Σελίδα 44
... base AB , and between the same parallels with the parallelogram ABCD , is half the parallelogram . Cor . 3. It is ... bases and between the same parallels , are equal to one another , that is , if BD = GH , and the lines BH and AF ...
... base AB , and between the same parallels with the parallelogram ABCD , is half the parallelogram . Cor . 3. It is ... bases and between the same parallels , are equal to one another , that is , if BD = GH , and the lines BH and AF ...
Σελίδα 45
... bases and between the same parallels , are equal , seeing by cor . 2. theo . 12. ) they are the halves of their respective parallelograms . THEOREM XIV . or In every right - angled triangle , ABC , the square of the hypothe- nuse or ...
... bases and between the same parallels , are equal , seeing by cor . 2. theo . 12. ) they are the halves of their respective parallelograms . THEOREM XIV . or In every right - angled triangle , ABC , the square of the hypothe- nuse or ...
Σελίδα 46
... base and perpendicular , will be the hypothenuse . Cor . 2. Having the hypothenuse and one leg given to find the other ; the square root of the difference of the squares of the hypothenuse and given leg , will be the required leg ...
... base and perpendicular , will be the hypothenuse . Cor . 2. Having the hypothenuse and one leg given to find the other ; the square root of the difference of the squares of the hypothenuse and given leg , will be the required leg ...
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A Treatise of Practical Surveying: Which is Demonstrated From Its First ... Robert Gibson Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2021 |
Συχνά εμφανιζόμενοι όροι και φράσεις
20 perches ABCD acres altitude Answer base bearing blank line centre chains and links chord circle circumferentor Co-secant co-sine Co-tang column compass contained cyphers decimal decimal fraction difference Dist 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 measure meridian distance multiplied needle number of degrees object off-sets opposite parallel parallelogram perpendicular piece of ground plane polygon Portmarnock PROB proportion protractor quotient radius right angles right line scale of equal SCHOLIUM secant second station sect semicircle side sights sine square root stationary distance stationary line sun's suppose survey taken tang tangent thence theo theodolite THEOREM thro triangle ABC trigonometry true amplitude true azimuth two-pole chains vane variation whence