 | John Playfair - 1833 - 346 sivua
...can be assigned. ELEMENTS GEOMETRY, SUPPLEMENT. BOOK II. OF THE INTERSECTION OF PLANE*. DEFINITIONS. A STRAIGHT line is perpendicular or at right angles to a plane, wrier, it makes right angles with every straight line which it meets ir_ that plane. II. A plane is... | |
 | Euclides - 1834 - 518 sivua
...that which hath length, breadth, and thickness. II. That which bounds a solid is a superficies. III. A straight line is perpendicular, or at right angles,...when it makes right angles with every straight line in that plane which meets it. IV. A plane is perpendicular to a plane, when the straight lines drawn... | |
 | John Playfair - 1835 - 336 sivua
...be aseigned. ELEMENTS OF GEOMETRY SUPPLEMENT. BOOK II. OF THE INTERSECTION OF PLANES. DEFINITIONS. 1. A sTRAIGHT line is perpendicular or at right angles...when it makes right angles with every straight line which it meets in that plane. 2. A plane is perpendicular to a plane, when the straight lines drawn... | |
 | Euclid - 1835 - 540 sivua
...FE makes right angles with every straight line which meets it in that plane. But a straight line is at right angles to a plane, when it makes right angles with every straight Tine which meets it in that plane f: Therefore EF is at right f3.def.ll. angles to the plane in which... | |
 | 1835 - 684 sivua
...(Eue. xi. def. 3.) A straight line is said to be perpendicular (or at right angles) to a plane, wnen it makes right angles with every straight line meeting it in that plane, (see Prop 3.). Also, conversely, in this case the plane is said to be perpendicular to the straight... | |
 | 1836 - 488 sivua
...greater than ten of the parts whereof the diameter contains seventy one. BOOK ii. — DEFINITIONS. 1. A straight line is perpendicular or at right angles...when it makes right angles with every straight line which it meets in that plane. 2. A plane is perpendicular to a plane, when the straight lines drawn... | |
 | A. Bell - 1837 - 180 sivua
...in the same plane, but they may he represented by means of diagrams drawn on a plane. DEFINITIONS. 1. A straight line is perpendicular, or at right angles...with every straight line meeting it in that plane. 2. A plane is perpendicular to a plane, when the straight lines drawn in one of the planes perpendicularly... | |
 | John Playfair - 1837 - 332 sivua
...assigned. ! ELEMENTS r OF GEOMETRY. SUPPLEMENT. BOOK II. OF THE INTERSECTION OF PLANES. DEFINITIONS. 1. A STRAIGHT line is perpendicular or at right angles...when it makes right angles with, every straight line which it meets in that plane. 2. A plane is perpendicular to a plane, when the straight lines drawn... | |
 | A. Bell - 1837 - 180 sivua
...diagrams drawn on a plane. DEFINITIONS. 1. A straight line is perpendicular, or at right angles toft plane, when it makes right angles with every straight line meeting it in that plane. 2. A plane is perpendicular to a plane, when the straight lines drawn in one of the planes perpendicularly... | |
 | Robert Simson - 1838 - 434 sivua
...that which hath length, breadth and thickness. n. That which bounds a solid is a superficies. III. A straight line is perpendicular, or at right angles...with every straight line meeting it in that plane. A plane is perpendicular to a plane, when the straight lines drawn in one of the planes perpendicularly... | |
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A plane is perpendicular to a plane, when the straight lines drawn in one of the planes perpendicular to the common section of the two planes, are perpendicular to the other plane. 5. The inclination of a straight line to a plane... 
