A Treatise of Practical Surveying, ...1808 - 440 σελίδες |
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Σελίδα 1
... parts , this number is called the denominator ; and if we chuse to take any number of such parts less than the whole , this is called the numerator of a fraction . В The numerator in the vulgar form , is always wrote THE.
... parts , this number is called the denominator ; and if we chuse to take any number of such parts less than the whole , this is called the numerator of a fraction . В The numerator in the vulgar form , is always wrote THE.
Σελίδα 3
... less , while the denomination of it increases , and becomes so many times greater , by prefixing one , or two , or three cyphers to it and that any number of cyphers , before an integer , or after a decimal fraction , has no effect in ...
... less , while the denomination of it increases , and becomes so many times greater , by prefixing one , or two , or three cyphers to it and that any number of cyphers , before an integer , or after a decimal fraction , has no effect in ...
Σελίδα 16
... . An obtuse angle is that which is wider or greater than a right one , as the angle ADE . fig . 7. and an acute angle is less than a right one , as EDB . fig . 7 . Plate I. 13. Acute and obtuse angles in general are 13. Acute 16 GEOMETRY .
... . An obtuse angle is that which is wider or greater than a right one , as the angle ADE . fig . 7. and an acute angle is less than a right one , as EDB . fig . 7 . Plate I. 13. Acute and obtuse angles in general are 13. Acute 16 GEOMETRY .
Σελίδα 17
... less as the radius is . 19. A chord is a right line drawn from one end of an arc or arch ( that is , any part of the circum- ference of a circle ) to the other ; and is the measure of the arc . Thus the right line HG , is the measure of ...
... less as the radius is . 19. A chord is a right line drawn from one end of an arc or arch ( that is , any part of the circum- ference of a circle ) to the other ; and is the measure of the arc . Thus the right line HG , is the measure of ...
Σελίδα 18
... less the chord is , the more unequal are the segments . 3. When the chord is greatest it becomes a di- ameter , and then the segments are equal ; and each segment is a semicircle . 21. A sector of a circle is a part thereof less than a ...
... less the chord is , the more unequal are the segments . 3. When the chord is greatest it becomes a di- ameter , and then the segments are equal ; and each segment is a semicircle . 21. A sector of a circle is a part thereof less than a ...
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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.