| George Albert Wentworth, David Eugene Smith - Geometry - 1913 - 496 pages
...perpendicular to the plane. PROPOSITION II. THEOREM 431. If a line is perpendicular to each of two other **lines at their point of intersection, it is perpendicular to the plane of** the two lines. Given the line AO perpendicular to the lines OP and OR at 0. To prove that AO is A.... | |
| George Albert Wentworth, David Eugene Smith - Geometry - 1913 - 496 pages
...perpendicular to the line. PROPOSITION II. THEOREM 431. If a line is perpendicular to each of two other **lines at their point of intersection, it is perpendicular to the plane of** the two lines. Given the line AO perpendicular to the lines OP and OR at 0. To prove that AO is JL... | |
| George Albert Wentworth, David Eugene Smith - Geometry - 1913 - 491 pages
...perpend-icular to the plane. PROPOSITION II. THEOREM 431. If a line is perpendicular to each of two other **lines at their point of intersection, it is perpendicular to the plane** of-the two lines. Given the line AO perpendicular to the lines OP and OR at 0. To prove that AO is... | |
| Education - 1914 - 914 pages
...rectangle contained by the perpendicular and the diameter of the circle described about the triangle. 6. **If a straight line is perpendicular to each of two straight lines at their point of intersection, it** shall also be perpendicular to the plane in which they lie. 7. If a pyramid is cut by planes drawn... | |
| College Entrance Examination Board - Mathematics - 1915 - 72 pages
...given for more than six questions. 1. Prove: If a straight line is perpendicular to two intersecting **straight lines at their point of intersection, it is perpendicular to the plane of** those lines. 2. a) Prove: If two intersecting straight lines are parallel to a plane, their plane is... | |
| John Charles Stone, James Franklin Millis - Geometry, Solid - 1916 - 196 pages
...perpendicular. SOLID GEOMETRY 303. Theorem. — If a straight line is perpendicular to each of two intersecting **straight lines at their point of intersection, it is perpendicular to the plane** determined by them. Hypothesis. Lines CD and EF intersect at 0, and determine plane MN; AB _L CD and... | |
| 1916 - 466 pages
...equal to oneSOLID GEOMETRY (Omit one.) 1. Prove that if a line is perpendicular to each of two other **lines at their point of intersection it is perpendicular to the plane of** the two lines. 2. The line AB cuts 3 parallel planes in the points A, E, B; and the line CD cuts these... | |
| William Betz - Geometry - 1916 - 536 pages
...of a circle is called an ellipse. E\ Pi PEKPENDICULAB LINES AND PLANES PROPOSITION VI. THEOREM 546. **If a straight line is perpendicular to each of two straight lines** in a plane, at their point of intersection, it is perpendicular to any line lying in the plane and... | |
| William Betz, Harrison Emmett Webb - Geometry, Solid - 1916 - 214 pages
...is % called an ellipse. ^Z. Et BOOK VI PEBPEKDICULAE LINES AND PLANES PROPOSITION VI. THEOREM 546. **If a straight line is perpendicular to each of two straight lines** in a plane, at their point of intersection, it is perpendicular to any line lying in the plane and... | |
| Fletcher Durell, Elmer Ellsworth Arnold - Geometry, Solid - 1917 - 220 pages
...SOLID GEOMETRY. BOOK VI PROPOSITION I. THEOREM 440. If a line is perpendicular to each of two other **lines at their point of intersection, it is perpendicular to the plane of** the two lines. , Given the line AB _L lines BC and BD, and the plane MN passing through BC and BD.... | |
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