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
... four sides is called a quadri- lateral figure . 29. Quadrilateral figures whose opposite sides are parallel , are called parallelograms : thus ABCD is a parallelogram . fig . 3. 17. and fig . 18. 19 . [ see fig . 3 . page 25. ] ن 30. A ...
... four sides is called a quadri- lateral figure . 29. Quadrilateral figures whose opposite sides are parallel , are called parallelograms : thus ABCD is a parallelogram . fig . 3. 17. and fig . 18. 19 . [ see fig . 3 . page 25. ] ن 30. A ...
Σελίδα 30
... four 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 ...
... four 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 ...
Σελίδα 31
... Four quantities are said to be in proportion when the product of the extremes is equal to that of means thus if A multiplied by D , be equal to B multiplied by C , then A is said to be to B , as C is to D. POSTULATES OR PETITIONS . 1 ...
... Four quantities are said to be in proportion when the product of the extremes is equal to that of means thus if A multiplied by D , be equal to B multiplied by C , then A is said to be to B , as C is to D. POSTULATES OR PETITIONS . 1 ...
Σελίδα 33
... four quantities , A , B , C , D , are proportional , they are usually written thus , A : B :: C : D ; and read thus , as A is to B , so is C to D ; but when three quantities A , B , C , are proportional , the middle quantity is repeated ...
... four quantities , A , B , C , D , are proportional , they are usually written thus , A : B :: C : D ; and read thus , as A is to B , so is C to D ; but when three quantities A , B , C , are proportional , the middle quantity is repeated ...
Σελίδα 34
... made by these lines will be equal to two right angles . 2. And all the angles which can he made about a point , will be equal to four right angles . THEOREM II . If one right line cross another ( GEOMETRICAL THEOREMS. ...
... made by these lines will be equal to two right angles . 2. And all the angles which can he made about a point , will be equal to four right angles . THEOREM II . If one right line cross another ( GEOMETRICAL THEOREMS. ...
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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