A System of Geometry and Trigonometry: Together with a Treatise on Surveying: Teaching Various Ways of Taking the Survey of a Field; Also to Protract the Same and Fine the Area. Likewise, Rectangular Surveying; Or, an Accurate Method of Calculating the Area of Any Field Arithmetically, Without the Necessity of Plotting It. To the Whole are Added Several Mathematical Tables ... with a Particular Explanation ... and the Manner of Using Them ...O. D. Cooke, 1813 - 168 σελίδες |
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Αποτελέσματα 1 - 5 από τα 15.
Σελίδα 9
... those Angles are called Right Angles ; and the Line CD is said to be Perpendicular to the other Line . 8. An Obtuse Angle is greater than a Right Angles as ADE . Fig . 3 . 9. An Acute Angle is less than a Right Angle 2 GEOMETRY. ...
... those Angles are called Right Angles ; and the Line CD is said to be Perpendicular to the other Line . 8. An Obtuse Angle is greater than a Right Angles as ADE . Fig . 3 . 9. An Acute Angle is less than a Right Angle 2 GEOMETRY. ...
Σελίδα 11
... perpendicular to the Radius or Diam- eter drawn through the other end : Or , it is half the Chord of double the Arch ; thus HL is the Sine of the Arch HB . Fig . 7 . 21. The Sines on the same Diameter increase in length till they come ...
... perpendicular to the Radius or Diam- eter drawn through the other end : Or , it is half the Chord of double the Arch ; thus HL is the Sine of the Arch HB . Fig . 7 . 21. The Sines on the same Diameter increase in length till they come ...
Σελίδα 13
... perpendicular height of a Triangle is a Line drawn from one of the Angles to its opposite Side ; thus the dotted Line AD . Fig . 14. is the perpendicular height of the Triangle ABC . Note . This Perpendicular may be drawn from either of ...
... perpendicular height of a Triangle is a Line drawn from one of the Angles to its opposite Side ; thus the dotted Line AD . Fig . 14. is the perpendicular height of the Triangle ABC . Note . This Perpendicular may be drawn from either of ...
Σελίδα 14
... foot in B de- scribe Arches to cross the former ; lay a Rule from C to D , and where the Rule crosses the Line , as at E , will PROBLEM III . To erect a Perpendicular from the end be the middle . 142 GEOMETRY . PART II. ...
... foot in B de- scribe Arches to cross the former ; lay a Rule from C to D , and where the Rule crosses the Line , as at E , will PROBLEM III . To erect a Perpendicular from the end be the middle . 142 GEOMETRY . PART II. ...
Σελίδα 15
... Perpendicular from the end , or any part of a given Line . Fig . 24 . Open the Dividers to any convenient distance , as from D to A , and with one foot on the Point D , from which the Perpendicular is to be erected , describe an Arch ...
... Perpendicular from the end , or any part of a given Line . Fig . 24 . Open the Dividers to any convenient distance , as from D to A , and with one foot on the Point D , from which the Perpendicular is to be erected , describe an Arch ...
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A System of Geometry and Trigonometry: Together with a Treatise on Surveying ... Able Flint Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2017 |
A System of Geometry and Trigonometry: Together with a Treatise on Surveying ... Able Flint Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2017 |
Δημοφιλή αποσπάσματα
Σελίδα 26 - As the base or sum of the segments Is to the sum of the other two sides, So is the difference of those sides To the difference of the segments of the base.
Σελίδα 23 - The square of the hypothenuse is equal to the sum of the squares of the other two sides ; as, 5033 402+302.
Σελίδα 8 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; and each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds ; and these into thirds, &c.
Σελίδα 25 - TO THEIR DIFFERENCE ; So IS THE TANGENT OF HALF THE SUM OF THE OPPOSITE ANGLES', To THE TANGENT OF HALF THEIR DIFFERENCE.
Σελίδα 25 - The solution of this CASE depends on the following PROPOSITION. In every Plane Triangle, As the Sum of any two Sides ; Is to their Difference ; So is the Tangent of half the Sum of the two opposite Angles ; To the Tangent of half the Difference between them. Add this half difference to half the Sum of the Angles and you will have the greater Angle ; and...
Σελίδα 8 - The radius of a circle is a line drawn from the centre to the circumference, as A, B.
Σελίδα 40 - Field work and protraction are truly taken and performed ; if not, an error must have been committed in one of them : In such cases make a second protraction ; if this agrees with the former, it is to be presumed the fault is in the Field work ; a re-survey must then be taken.
Σελίδα 40 - Let his attention first be directed to the map, and inform him that the top is north, the bottom south, the right hand east, and the left hand west.