 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.  Elementary Course of Geometry ... - Pàgina 1per Charles William Hackley - 1847 - 103 pàginesVisualització completa - Sobre aquest llibre
 | Charles Hutton - 1860 - 1020 pàgines
...two point? 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,...This point is called the foot of the perpendicular. 3. The inclination of a straight line to a plane, is the acute angle contained by the straight line,... | |
 | Evan Wilhelm Evans - 1862 - 116 pàgines
...given square. BOOK III. SOLID GEOMETRY. SEC. XIII.— PLANES AND THEIR INCLINATIONS. DEFINITIONS. 1. A straight line is said to be perpendicular to a plane when it is perpendicular to every straight line it can meet in that plane. 2. The line in which two planes cut one another is called... | |
 | Eli Todd Tappan - 1864 - 288 pàgines
...shown that any other line, perpendicular to AB at the point B, is in the plane of C, B, D, and E. 519. 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... | |
 | Gerardus Beekman Docharty - 1867 - 474 pàgines
...two points 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...This point is called the foot of the perpendicular. 3. The inclination of a straight line to a plane is the acute angle contained by the straight line... | |
 | Eli Todd Tappan - 1868 - 432 pàgines
...ihat any other line, perpendicular to AB at the point B, is in the plp,ne of C, B, D, and E. 5 IS). 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... | |
 | Francis Henney Smith - 1868 - 86 pàgines
...the construction of all geometrical figures, are considered as indefinite in extent. DEF. 4. A right line is said to be perpendicular to a plane, when it is perpendicular to all right lines drawn through its foot in that plane. DEF. 5. If a right line be perpendicular to a plane,... | |
 | James Maurice Wilson - 1872 - 160 pàgines
...intersect is the angle formed by straight lines from any point respectively parallel to those lines. Def. 3. A straight line is said to be perpendicular to a plane when it is perpendicular to every straight line that meets it in that plane. It is also said to be normal to the plane. THEOREM... | |
 | Eli Todd Tappan - 1873 - 288 pàgines
...shown that any other line, perpendicular to AB at the point B, is in the plane of C, B, D, and E. 519. 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... | |
 | Gerardus Beekman Docharty - 1865 - 328 pàgines
...the co-ordinates of every point of the plane. PEOPOSITION IX. (144.) To find the equation of a plane. A straight line is said to be perpendicular to a plane...pass through the point in which it meets the plane. Hence a plane may be generated by the motion of a straight line round a point in another straight line... | |
 | James Maurice Wilson - 1873 - 178 pàgines
...any two points being taken, the straight line which joins them lies wholly in that surface. Def. 2. A straight line is said to be perpendicular to a plane when it is perpendicular to every straight line that meets it in that plane. It is also said to be normal to the plane. Def. 3.... | |
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