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Books Books 1 - 10 of 27 on A straight line is said to be perpendicular to a plane when it is perpendicular to....  
" A straight line is said to be perpendicular to a plane when it is perpendicular to every straight line which passes through its foot in that plane, and the plane is said to be perpendicular to the line. "
A system of popular trigonometry - Page iii
by George Darley - 1835
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Elements of geometry: with their application to the mensuration of ...

Thomas Simpson - Geometry - 1760 - 276 pages
...Conftr. done. ~ * 7- 4The End of the SIXTH BOOK. GEOMETR Y. BOOK VIL DEFINITIONS, Right-line is faid to be perpendicular to a plane, when it is perpendicular to all right-lines, that can be drawn in Chat plane, from the point on which it infifts. ~A 2. One plane is...
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Elements of geometry: with practical applications, for the use of schools

Timothy Walker - Geometry - 1829 - 104 pages
...angles, it is evident that they have the properties of linear angles (20, 21, 22, 34, 35, 39). 127. A line is said to be perpendicular to a plane when it is perpendicular to all the straight lines which can be drawn through its foot in the plane . For then it will make a right...
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Elements of Plane and Spherical Trigonometry: With Its Applications to the ...

John Radford Young - Trigonometry - 1833 - 264 pages
...same straight line, the two planes passing through them must coincide and form but one. A straight line is said to be perpendicular to a plane when it is perpendicular to every straight line in that plane, drawn through ilsjbot, or the point where the perpendicular meets...
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Elements of Geometry, Theoretical and Practical: Including Constructions of ...

Eugenius Nulty - Geometry - 1836 - 220 pages
...wherefore the triangle BE B' is isosceles, and B B' or AB is perpendicular to the right line A E. в 5. A right line is said to be perpendicular to a plane, when it is perpendicular to every right line which it meets in that plane ; and conversely the plane is said to be perpendicular...
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Elements of analytical geometry: embracing the equations of the point, the ...

Charles Davies - Geometry, Analytic - 1836 - 352 pages
...co-ordinates of every point of the plane. PROPOSITION VII. PROBLEM. To find the equation of a plane. A line is said to be perpendicular to a plane when it is perpendicular to every line passing through its foot and lying in the plane : and conversely the plane is said to be...
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Elements of analytical geometry: embracing the equations of the point, the ...

Charles Davies - Geometry, Analytic - 1838 - 352 pages
...co-ordinates of every point of the plane. PROPOSITION VII. PROBLEM. To find the equation of a plane. A line is said to be perpendicular to a plane when it is perpendicular to every line passing through its foot and lying in the plane : and conversely the plane is said to be...
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Elementary Course of Geometry ...

Charles William Hackley - Geometry - 1847 - 103 pages
...be taken, the straight line which joins these points will be wholly in that surface. 3. A straight line is said to be perpendicular to a plane when it is perpendicular to all the straight lines in the plane which pass through the point in which it meets the plane. This point is...
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Rifles and Rifle Practice: An Elementary Treatise Upon the Theory of Rifle ...

Cadmus Marcellus Wilcox - Rifle practice - 1859 - 276 pages
...pleasure, and joining them by a straight line, that line will lie wholly in the surface. A straight line is perpendicular to a plane when it is perpendicular to all the right lines (in that plane) drawn through its extremity in the plane. The name of vertical is given to every straight line which...
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A Course of Mathematics: Composed for the Use of the Royal Military Academy

Charles Hutton - Mathematics - 1860 - 895 pages
...be taken, the straight line whii-h joins these points will be wholly in that surface. 2. A straight line is said to be perpendicular to a plane, when it is perpendicular to all the straight lines in the plane which pass through the point in which it meets the plane. This point is...
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Elements of Plane and Solid Geometry: And of Plane and Spherical ...

Gerardus Beekman Docharty - Geometry - 1867 - 283 pages
...be taken, the straight line which joins these points will be wholly in that surface. 2. A straight line is said to be perpendicular to a plane when it is perpendicular to all the straight lines in the plane which pass through the point in which it meets the plane. This point is...
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