The geometry, by T. S. Davies. Conic sections, by Stephen FenwickJ. Weale, 1853 |
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Αποτελέσματα 1 - 5 από τα 100.
Σελίδα 3
... angled triangle is that which has three acute angles . 30. Of four - sided figures , a square is that which has all its sides equal , and all its angles right angles . 31. An oblong is that which has all its angles right angles , but ...
... angled triangle is that which has three acute angles . 30. Of four - sided figures , a square is that which has all its sides equal , and all its angles right angles . 31. An oblong is that which has all its angles right angles , but ...
Σελίδα 4
... right angles are equal to one another . 12. If a straight line meets two straight lines , so as to make the two interior angles on the same side of it taken together less than two right angles , these straight lines being continually ...
... right angles are equal to one another . 12. If a straight line meets two straight lines , so as to make the two interior angles on the same side of it taken together less than two right angles , these straight lines being continually ...
Σελίδα 9
... angles . Let BAC be the given rectilineal angle , it is required to bisect it . Take any point D in AB , and from AC ... right angles to a given straight line , from a given point in the same . Let AB be a given straight line , and C a ...
... angles . Let BAC be the given rectilineal angle , it is required to bisect it . Take any point D in AB , and from AC ... right angles to a given straight line , from a given point in the same . Let AB be a given straight line , and C a ...
Σελίδα 10
... right ( 10 Def . ) angle ; therefore each of the angles DCF , ECF , is a right angle . Wherefore , from the given point C , in the given straight line AB , FC has been drawn at right angles to AB . Which was to be done . COR . By help ...
... right ( 10 Def . ) angle ; therefore each of the angles DCF , ECF , is a right angle . Wherefore , from the given point C , in the given straight line AB , FC has been drawn at right angles to AB . Which was to be done . COR . By help ...
Σελίδα 11
... right angles ( 11. 1. ) to CD ; therefore the angles CBE , EBD ( 10 Def . ) are two right angles ; D A E B C D B C And because CBE is equal to the two angles CBA , ABE together , add the angle EBD to each of these equals ; therefore the ...
... right angles ( 11. 1. ) to CD ; therefore the angles CBE , EBD ( 10 Def . ) are two right angles ; D A E B C D B C And because CBE is equal to the two angles CBA , ABE together , add the angle EBD to each of these equals ; therefore the ...
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ABC is equal ABCD adjacent angles angle ABC angle BAC axis bisected centre circle ABC circumference coincide cone construction coordinate planes described Descriptive Geometry diameter dicular dihedral angles draw edges ellipse equal angles equiangular equimultiples given line given point given straight line greater hence horizontal hyperbola inclination intersection join less Let ABC Let the plane line BC lines drawn magnitudes meet multiple orthograph parabola parallel planes parallelogram parallelopiped perpen perpendicular perpendicular to MN plane MN plane of projection plane parallel plane PQ prisms profile angles profile plane projecting plane Prop Q. E. D. PROPOSITION ratio rectangle rectangle contained rectilineal figure remaining angle respectively right angles SCHOLIUM segment sides six right sphere spherical angle tangent THEOR trace triangle ABC trihedral vertex Whence Wherefore