| Arthur Schultze, Frank Louis Sevenoak - Geometry - 1913 - 457 pages
...the ends of a line is a plane perpendicular to the line at its mid-point. PROPOSITION X. THEOREM 504. **If one of two parallel lines is perpendicular to a plane, the other** is also perpendicular to the plane. Given AB II A'B', and AB _L plane MN. To prove A'B' _L plane MN.... | |
| David Eugene Smith - Geometry, Solid - 1924 - 238 pages
...(§ 3, 9), and then that AB and CD are each _L to BD (§ 33). .'.AB is II to CD. §9,9 48. Corollary. **If one of two parallel lines is perpendicular to a plane, the other** is also perpendicular to the plane. For if through any point O of 6 a line is drawn J. to m, how is... | |
| Baltimore (Md.). Department of Education - Mathematics - 1924 - 169 pages
...given point outside a plane, one plane, and but one, can be passed parallel to the given plane. 14. **If one of two parallel lines is perpendicular to a plane, the other** is also perpendicular to that plane. 15 . Two dihedral angles are equal if their plane angles are equal.... | |
| Arthur Schultze, Frank Louis Sevenoak - Geometry - 1925 - 480 pages
...is the plane that is perpendicular to the line at its middle point. PROPOSITION XI. THEOREM 510. // **one of two parallel lines is perpendicular to a plane, the other** is also perpendicular to the plane. Given AB \\ A'B', and AB _L plane MAT. To prove A'B' _L plane MN.... | |
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