Elements of Geometry: With Practical Applications Designed for BeginnersD. Appleton, 1853 - 320 σελίδες |
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Σελίδα 144
... degrees in each angle , would have been only thirteen . ( 94. ) In ornamental architecture , polygons are used in the forma- tion of surfaces produced by the juxtaposition of solid blocks , as in flooring , paving , or by their ...
... degrees in each angle , would have been only thirteen . ( 94. ) In ornamental architecture , polygons are used in the forma- tion of surfaces produced by the juxtaposition of solid blocks , as in flooring , paving , or by their ...
Σελίδα 181
... angle they form between them , is the angle contained by two lines drawn from any point in their intersection , and ... solid angle is the angular space included be- tween three or more planes which meet at the same point . 16 ...
... angle they form between them , is the angle contained by two lines drawn from any point in their intersection , and ... solid angle is the angular space included be- tween three or more planes which meet at the same point . 16 ...
Σελίδα 197
... solid angle is formed by three plane angles , the sum of any two of these angles will be greater than the third . The proposition requires de- monstration only when the plane angle , which is compared to the sum of the other two , is ...
... solid angle is formed by three plane angles , the sum of any two of these angles will be greater than the third . The proposition requires de- monstration only when the plane angle , which is compared to the sum of the other two , is ...
Σελίδα 198
... angle BSD = BSC ; draw the straight line ADB at pleasure ; and , having taken . SC = SD , join AC , BC . The two ... solid angle , is always less than four right - angles . Conceive the solid angle S to be cut by any plane ABCDE : from O ...
... angle BSD = BSC ; draw the straight line ADB at pleasure ; and , having taken . SC = SD , join AC , BC . The two ... solid angle , is always less than four right - angles . Conceive the solid angle S to be cut by any plane ABCDE : from O ...
Σελίδα 199
... solid angle S , is less than four right- angles . Schol . This demonstration is founded on the supposi- tion that the solid angle is convex , or that the plane of no one surface produced can ever meet the solid angle . If it were ...
... solid angle S , is less than four right- angles . Schol . This demonstration is founded on the supposi- tion that the solid angle is convex , or that the plane of no one surface produced can ever meet the solid angle . If it were ...
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Elements of Geometry With Practical Applications George R Perkins Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2023 |
Συχνά εμφανιζόμενοι όροι και φράσεις
a+b+c altitude angle ABC angle ACD angle BAC bisect centre chord circ circular sector circumference circumscribed polygon coincide cone consequently convex surface cylinder diagonal diameter distance draw equal and parallel equiangular equilateral triangle equivalent exterior angle ference figure formed given line greater half the arc hypothenuse inscribed circle intersection isosceles join less Let ABC line CD lines drawn magnitude measured by half meet multiplied number of sides opposite angles parallel lines parallelogram parallelopipedon pendicular perimeter perpen perpendicular plane MN point G prism PROBLEM produced Prop proportional PROPOSITION pyramid radii radius rectangle regular polygon respectively equal right-angled triangle Sabc Schol Scholium scribed semicircle semicircumference side AC similar solid angle sphere spherical polygon square straight line suppose tangent THEOREM three sides triangle ABC triangular prism vertex VIII