The geometry, by T. S. Davies. Conic sections, by Stephen FenwickJ. Weale, 1853 |
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Σελίδα 1
... inclination of two lines to one another in a plane , which meet together , but are not in the same direction . 9. A plane rectilineal angle is the inclination of two straight lines to one another , which meet together , but are not in ...
... inclination of two lines to one another in a plane , which meet together , but are not in the same direction . 9. A plane rectilineal angle is the inclination of two straight lines to one another , which meet together , but are not in ...
Σελίδα 71
... inclination to the horizon is given ; and a flagstaff of given length surmounts the tower : where must the spectator stand ( the height of his eye above the ground also given ) to see the flagstaff under a given angle , and under the ...
... inclination to the horizon is given ; and a flagstaff of given length surmounts the tower : where must the spectator stand ( the height of his eye above the ground also given ) to see the flagstaff under a given angle , and under the ...
Σελίδα 140
... inclination to one another is called the inclination of the planes . If the profile angle be a right angle , the planes are said to be perpendicular to one another . 5. If a straight line be perpendicular to each of two straight lines ...
... inclination to one another is called the inclination of the planes . If the profile angle be a right angle , the planes are said to be perpendicular to one another . 5. If a straight line be perpendicular to each of two straight lines ...
Σελίδα 211
... inclination of the planes of the secondaries ; and hence again , equal to the spherical angle CAD ( Def . 17 ) . B COR . 1. If two great semicircles ACB , ADB , be bisected in C and D , the arc CD of a great circle joining them , is the ...
... inclination of the planes of the secondaries ; and hence again , equal to the spherical angle CAD ( Def . 17 ) . B COR . 1. If two great semicircles ACB , ADB , be bisected in C and D , the arc CD of a great circle joining them , is the ...
Σελίδα 241
... inclination to be from one specified side of the point about which a line may revolve or one specified side of the line about which the plane revolves , to form its inclination with the plane of projection . Thus : — 8 FIG 1 M A C M B ...
... inclination to be from one specified side of the point about which a line may revolve or one specified side of the line about which the plane revolves , to form its inclination with the plane of projection . Thus : — 8 FIG 1 M A C M B ...
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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