A Treatise of Practical Surveying, ...1808 - 440 σελίδες |
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Σελίδα
... fourth section contains two methods of finding the areas of maps from their ge ometrical construction , more concise than any heretofore made public . and The fifth section contains a new , much more concise method of determining the ...
... fourth section contains two methods of finding the areas of maps from their ge ometrical construction , more concise than any heretofore made public . and The fifth section contains a new , much more concise method of determining the ...
Σελίδα 9
... fourth of three shillings , yards , perches , & c . therefore if 3 be divided by 4 , the quotient will be the answer . Reduce to a decimal fraction . 5 ) 2.0.4 Answer . Reduce to a decimal fraction . 25 ) 12.00 ( 48 Answer . 200 Reduce ...
... fourth of three shillings , yards , perches , & c . therefore if 3 be divided by 4 , the quotient will be the answer . Reduce to a decimal fraction . 5 ) 2.0.4 Answer . Reduce to a decimal fraction . 25 ) 12.00 ( 48 Answer . 200 Reduce ...
Σελίδα 19
... fourth part of the peri- phery ; therefore the radius DC is always the sine of a quadrant , or of the fourth part of the circle BD . Sines are said to be of as many degrees as the arc contains parts of 360 : so the radius being the sine ...
... fourth part of the peri- phery ; therefore the radius DC is always the sine of a quadrant , or of the fourth part of the circle BD . Sines are said to be of as many degrees as the arc contains parts of 360 : so the radius being the sine ...
Σελίδα 24
... fourth , & c . part . Note . Though these postulates are not always quoted , the reader will easily perceive where , and in what sense they are to be understood . AXIOMS or self - evident TRUTHS . 1. Things that are equal to one , and ...
... fourth , & c . part . Note . Though these postulates are not always quoted , the reader will easily perceive where , and in what sense they are to be understood . AXIOMS or self - evident TRUTHS . 1. Things that are equal to one , and ...
Σελίδα 51
... by cor . 1. theo . 20. CG : CH :: CF : CI . Or , B : A :: A : CI . PROB . XII . Three right lines , A , B , C , given to find a fourth proportional . fig . 17 . Having Plate II . Having made an angle DEF anywise , PROBLEMS . 51.
... by cor . 1. theo . 20. CG : CH :: CF : CI . Or , B : A :: A : CI . PROB . XII . Three right lines , A , B , C , given to find a fourth proportional . fig . 17 . Having Plate II . Having made an angle DEF anywise , PROBLEMS . 51.
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Συχνά εμφανιζόμενοι όροι και φράσεις
40 perches ABCD acres altitude Answer base bearing blank line centre chains and links chord circle circumferentor Co-fecant Secant Co-fine Co-tang column contained cyphers decimal decimal fraction diameter difference Dift Diſt distance line divided draw drawn east edge EXAMPLE feet field-book figures fore four-pole chains half the sum height hypothenuse inches instrument latitude logarithm measure meridian distance method multiplied needle number of degrees object off-sets parallel parallelogram perpendicular piece of ground plane Plate pole Portmarnock PROB protractor quotient radius right angles right line scale of equal second station sect semicircle side sights sine square root stationary distance stationary line sun's survey taken tangent thence theo theodolite thro trapezium triangle ABC trigonometry true amplitude two-pole chains vane variation Vulgar Fraction whence ΙΟ
Δημοφιλή αποσπάσματα
Σελίδα 32 - The angle in a semicircle is a right angle ; the angle in a segment greater than a semicircle is less than a right angle ; and the angle in a segment less than a semicircle is greater than a right angle.
Σελίδα 199 - ... that triangles on the same base and between the same parallels are equal...
Σελίδα 94 - C' (89) (90) (91) (92) (93) 112. In any plane triangle, the sum of any two sides is to their difference as the tangent of half the sum of the opposite angles is to the tangent of half their difference.
Σελίδα 23 - Four quantities are said to be in proportion when the product of the extremes is equal to that of the 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.
Σελίδα 95 - TO THEIR DIFFERENCE ; So IS THE TANGENT OF HALF THE SUM OF THE OPPOSITE ANGLES', To THE TANGENT OF HALF THEIR DIFFERENCE.
Σελίδα 37 - ABDE+ACGF the sum of the squares —BKLH-\-KCML, the sum of the two parallelograms or square BCMH; therefore the sum of the squares on AB and AC is equal to the square on BC.
Σελίδα 24 - Things that are equal to one and the same thing, are equal to each other. 2. Every whole is greater than its part. % 3. Every whole is equal to all its parts taken together. 4 If to equal things, equal things be added, the whole will be equal. 5. If from equal things, equal things be deducted the remainders will be equal.
Σελίδα 36 - XIII. •All parallelograms on the same or equal bases and between the same parallels...
Σελίδα 182 - VI. To find the content of a triangular piece of ground, Multiply the base by half the perpendicular, or the perpendicular by half the base ; or take half the product of the base into the perpendicular. The reason hereof is plain, from cor.
Σελίδα 35 - Triangles upon equal bases, and between the same parallels, are equal to one another.