| William C. Bartol - Geometry, Solid - 1893 - 106 pages
...plane is the point where the line pierces the plane. This point is called the foot of the line. 4. **A line is perpendicular to a plane when it is perpendicular to every line** of the plane, passing through its foot. And the plane is then perpendicular to the line. 5. Planes... | |
| Arthur Latham Baker - Geometry, Solid - 1893 - 152 pages
...selecting three points, two in one of the given lines and the third in the other line. f 6. A straight **line is perpendicular to a plane when it is perpendicular to every** straight line of the plane which passes through its foot, that is, the point where it meets the plane.... | |
| William Chauvenet - 1893 - 340 pages
...intersection of the two planes. PERPENDICULARS AND OBLIQUE LINES TO PLANES. 6. Definition. A straight **line is perpendicular to a plane when it is perpendicular to every** straight line drawn in the plane through its foot; that is, through the point in which it meets the... | |
| Charles Ambrose Van Velzer, George Clinton Shutts - Geometry - 1894 - 416 pages
...planes ? 341. The point in which a straight line intersects a plane is called the foot of the line. 342. **A line is perpendicular to a plane when it is perpendicular to every line in** the plane drawn through its foot. PROPOSITION IV. THEOREM. 343. From a given point without a plane,... | |
| George Clinton Shutts - Geometry - 1894 - 412 pages
...contact, form an equilateral triangle whose side is 18 inches. Find the diameter of the circle. 405. **A line is perpendicular to a plane when it is perpendicular to** any line in the plane drawn through its foot. (a) The plane is then perpendicular to the line. 406.... | |
| Wooster Woodruff Beman, David Eugene Smith - Geometry - 1895 - 320 pages
...*= A BOP'. I, th. 12 6. .'. /_ POB is a rt. /_, and w _L y. Why ? DEFINITIONS. A line is said to be **perpendicular to a plane when it is perpendicular to every line in that plane which** passes through its foot, that is the point where it meets the plane. The plane is then said to be perpendicular... | |
| Wooster Woodruff Beman, David Eugene Smith - Geometry - 1895 - 344 pages
...BOP ^ A BOP'. I, th. 12 6. .'. Z. POB is a rt. Z, and w _L y. Why ? DEFINITIONS. A line is said to be **perpendicular to a plane when it is perpendicular to every line in that plane which** passes through its foot, that is the point where it meets the plane. The plane is then said to be perpendicular... | |
| George Washington Hull - Geometry - 1897 - 408 pages
...determined by given lines or points when one plane, and only one, can be drawn through them. 369. A straight **line is Perpendicular to a Plane when it is perpendicular to every** straight line of the plane passing through its foot. 370. A straight line is Parallel to a Plane when... | |
| James Howard Gore - Geometry - 1898 - 232 pages
...other line, the first two giving the required line and the third the required point. 326. A straight **line is perpendicular to a plane when it is perpendicular to every** straight line of the plane which passes through its foot, that is, the point where it meets the plane.... | |
| Wooster Woodruff Beman, David Eugene Smith - 1903 - 154 pages
...as an axis, it can be brought to coincide with A A CP'. § 57 339. Definitions. A line is said to be **perpendicular to a plane when it is perpendicular to every line in that plane which** passes through its foot, — ie the point where it meets the plane. The plane is then said to be perpendicular... | |
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