 | Fletcher Durell - Geometry, Solid - 1904 - 232 pages
...are in the same plan**. But AB and CD are ± and CD are (Why?) Art. 505. Art. 121. QED 525. COR. 1. If one of two parallel lines is perpendicular to a plane, the other is perpendicular to the plane also. For, if AB and CD be ||. and AB J. plane PQ, a line drawn from C _L... | |
 | Fletcher Durell - Geometry - 1911 - 553 pages
...plane. (Why?) But AB and CD are J_ 727). Art. 505. /. AB and CD are ||. Art. 121. QE D, 525, COR. 1. If one of two parallel lines -is perpendicular to a plane, the oilier ix perpendicular to the plane also. For, if AB and CD be ||, and AB _L Plane P#, a line drawn... | |
 | Isaac Newton Failor - Geometry - 1906 - 431 pages
...the extremities of a given straight line ? SOLID GEOMETRY — BOOK VI PROPOSITION VIII. THEOREM 534 If one of two parallel lines is perpendicular to a plane, the other is also perpendicular to the plane. N HYPOTHESIS. AB is || to CD, and AB is _L to the plane MN at B. CONCLUSION.... | |
 | Wisconsin. Department of Public Instruction - Education - 1906 - 124 pages
...any point in the perpendicular, the line so drawn is perpendicular to • the line of the plane. 9. If one of two parallel lines is perpendicular to a plane the other is also. 10. Two lines perpendicular to the same plane are parallel. Cor. Two straight lines both parallel to... | |
 | Isaac Newton Failor - Geometry - 1906 - 440 pages
...the extremities of a given straight line ? SOLID GEOMETRY— BOOK VI PROPOSITION VIII. THEOREM 534 If one of two parallel lines is perpendicular to a plane, the other is also perpendicular to the plane. § 117 HYPOTHESIS. AB is || to CD, and AB is -L to the plane MH at B. CONCLUSION.... | |
 | Webster Wells - Geometry - 1908 - 336 pages
...line drawn in the plane through its foot] (§ 350) 9. Then, AB II CD. SOLID GEOMETRY — BOOK VI 369. If one of two parallel lines is perpendicular to a plane, the other is aluo perpendicular to the plane. Let lines AB and CD be II, and AB Jto plane MN. Since two J§ to the... | |
 | Webster Wells - 1909 - 154 pages
...with any plane drawn through the line is parallel to the line.) § 362. 4. Hence plane DGHA _L BC. (If one of two parallel lines is perpendicular to a plane, the other is also perpendicular to the plane.) § 369. 5. Then, HALBC. (All the perpendiculars to a straight line at... | |
 | Geometry, Plane - 1911 - 192 pages
...perimeter of the trefoil is equal to that of the circumference of the circle, and find its area. 6. If one of two parallel lines is perpendicular to a plane, the other is also perpendicular to the plane. Can a plane always be drawn through a given point parallel to two straight... | |
 | George Clinton Shutts - Geometry - 1912 - 392 pages
...timber with a carpenter's square continuously the line will end at its starting point. 461. THEOREM. // one of two parallel lines is perpendicular to a plane, the other is also perpendicular to the plane. HD -M Given GH II CD and meeting plane M in G and C respectively, with... | |
 | Clara Avis Hart, Daniel D. Feldman - Geometry, Solid - 1912 - 220 pages
...§240. § 232. 5. 6. 7. 8. 9. 10. U. 12. 13. § 116. § 110. 310 BOOK VI J, PROPOSITION X. THEOREM 636. If one. of two parallel lines is perpendicular to a plane, the other also is perpendic AC r to the plane. Given AB II CD and AB _L plane MN. To prove CD _L plane MN. ARGUMENT... | |
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If one of two parallel lines is perpendicular to a plane, the other is also perpendicular to the plane. 
