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 39
... opposite points . of the circumference ; and it divides the circle and circumference into two equal parts , called semicir- cles ; and is double the radius , as AB or DE . fig . 8 . 16. The circumference of every circle is sup- posed to ...
... opposite points . of the circumference ; and it divides the circle and circumference into two equal parts , called semicir- cles ; and is double the radius , as AB or DE . fig . 8 . 16. The circumference of every circle is sup- posed to ...
Σελίδα 43
... nature of parallels . 41. Any figure of four sides is called a quadri- lateral figure . 42. Quadrilateral figures , whose opposite sides are parallel , are called parallelograms thus ABCD is a parallelogram . Fig . 3. 17 , GEOMETRY . 43.
... nature of parallels . 41. Any figure of four sides is called a quadri- lateral figure . 42. Quadrilateral figures , whose opposite sides are parallel , are called parallelograms thus ABCD is a parallelogram . Fig . 3. 17 , GEOMETRY . 43.
Σελίδα 44
... 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 , and has its angles oblique , as A. fig . 18. and is an inclined square . 46. A ...
... 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 , and has its angles oblique , as A. fig . 18. and is an inclined square . 46. A ...
Σελίδα 48
... opposite one on the same side , that is , GEB = EFD and AEG = CFE . 1 4. And the sum of the internal angles on the same side , are equal to two right angles ; that is , BEF + DFE are equal to two right angles , and AEF + CFE are equal ...
... opposite one on the same side , that is , GEB = EFD and AEG = CFE . 1 4. And the sum of the internal angles on the same side , are equal to two right angles ; that is , BEF + DFE are equal to two right angles , and AEF + CFE are equal ...
Σελίδα 49
... opposite angles taken together . Viz . to B and A. Through C , let CE be drawn parallel to AB ; then since BD cuts the two parallel lines BA , CE ; the angle ECD = B , ( by part 3. of the last theo . ) and again , since AC cuts the same ...
... opposite angles taken together . Viz . to B and A. Through C , let CE be drawn parallel to AB ; then since BD cuts the two parallel lines BA , CE ; the angle ECD = B , ( by part 3. of the last theo . ) and again , since AC cuts the same ...
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