The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skilful Practice of this ArtEvert Duyckinck, 1814 - 508 σελίδες |
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Σελίδα 38
... right ones , it is then called a right - lined angle , as ABC , fig . 4. If one of them be right and the other ... angles ADC , CDB on each side equal to each other , then those angles are called right angles , and the line CD a perpen ...
... right ones , it is then called a right - lined angle , as ABC , fig . 4. If one of them be right and the other ... angles ADC , CDB on each side equal to each other , then those angles are called right angles , and the line CD a perpen ...
Σελίδα 40
... right angles , and thus the periphery is divided into four equal parts , as BD , DA , AE , and EB ; ( by def . 10. ) and so BD be- comes a quadrant or the fourth part of the peri- phery therefore the radius DC is always the sine of a ...
... right angles , and thus the periphery is divided into four equal parts , as BD , DA , AE , and EB ; ( by def . 10. ) and so BD be- comes a quadrant or the fourth part of the peri- phery therefore the radius DC is always the sine of a ...
Σελίδα 42
... angle thus the angle HCB ( fig . 8. ) is measur- ed by the arc HB , and is said to ... right it is called a recti- lineal figure , if curved it is called a ... angles . 33. In respect to its sides it is either equilateral , having the ...
... angle thus the angle HCB ( fig . 8. ) is measur- ed by the arc HB , and is said to ... right it is called a recti- lineal figure , if curved it is called a ... angles . 33. In respect to its sides it is either equilateral , having the ...
Σελίδα 43
... angles , it is either right- angled , having one right angle , as D. fig . 13 . 37. Or obtuse angled , having one obtuse angle , as E. fig . 14 . 38. Or acute angled , having all the angles acute , as F. fig . 15 . 39. Acute and obtuse ...
... angles , it is either right- angled , having one right angle , as D. fig . 13 . 37. Or obtuse angled , having one obtuse angle , as E. fig . 14 . 38. Or acute angled , having all the angles acute , as F. fig . 15 . 39. Acute and obtuse ...
Σελίδα 44
... angles right , is called a square , as ABCD . fig . 17 . 44. A parallelogram whose opposite sides are equal and angles right , is called a rectangle , or an oblong , as ABCD . fig . 3 . 45. A rhombus is a parallelogram of equal sides ...
... angles right , is called a square , as ABCD . fig . 17 . 44. A parallelogram whose opposite sides are equal and angles right , is called a rectangle , or an oblong , as ABCD . fig . 3 . 45. A rhombus is a parallelogram of equal sides ...
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