| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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.... | |
| Claude Irwin Palmer - Geometry, Solid - 1918 - 192 pages
...but is not perpendicular to it. 571. Theorem. If a line is perpendicular to each of two intersecting **lines at their point of intersection, it is perpendicular to the plane** determined by these lines. Given AP -L AB and AD at their point of intersection A, and plane Q determined... | |
| Arthur Schultze, Frank Louis Sevenoak - Geometry - 1918 - 486 pages
...perpendicular to the plane. PROPOSITION VIII. THEOREM 499. If a straight line is perpendicular to each of two **lines at their point of intersection, it is perpendicular to the plane** of those lines. Given BC and BD -L AB, and plane MN containing BC and BD. To prove AB -L plane MN.... | |
| Claude Irwin Palmer, Daniel Pomeroy Taylor - Geometry - 1918 - 460 pages
...but is not perpendicular to it. 671. Theorem. If a line is perpendicular to each of two intersecting **lines at their point of intersection, it is perpendicular to the plane** determined by these lines. Given AP J- AB and AD at their point of intersection A, and plane Q determined... | |
| Herbert Ellsworth Slaught, Nels Johann Lennes - Geometry, Solid - 1919 - 232 pages
...PERPENDICULAR TO THE PLANE OF TWO GIVEN LINES 76. THEOREM III. If a line is perpendicular to each of two **lines at their point of intersection, it is perpendicular to the plane** of these lines. Given a line I perpendicular to each of the lines /, and lz at the point P. To prove... | |
| High schools - 1919 - 338 pages
...subject, namely a model to illustrate the theorem : 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. This model is made according to specifications, insuring uniformity, and I make a... | |
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