 | Wooster Woodruff Beman, David Eugene Smith - Geometry, Solid - 1900 - 160 pages
...Prop. V 4. .'.A Y'O'A', Y'O'B' are also rt. A, Prel. prop. I and 0'Y'±MN. §339 343. Definitions. The projection of a point on a plane is the foot of the perpendicular through that point to the plane. The projection of a line on a plane is the locus of the projections... | |
 | Arthur Schultze - 1901 - 392 pages
...plane CD is perpendicular to plane AB if they form right diedral angles. E DIEDRAL ANGLES 498. DBF. The projection of a point on a plane is the foot of the perpendicular drawn from that point upon the plane. The projection of a line upon a plane is the locus of the projection of... | |
 | Arthur Schultze, Frank Louis Sevenoak - Geometry - 1901 - 396 pages
...each other. Thus, plane CD is perpendicular to plane AB if they form right diedral angles. 498. DBF. The projection of a point on a plane is the foot of the perpendicular drawn from that point upon the plane. The projection of a line upon a plane is the locus of the projection of... | |
 | Arthur Schultze, Frank Louis Sevenoak - Geometry - 1902 - 394 pages
...diedral angles are said to be perpendicular to each other. Thus, plane CD is 252 DIEDRAL ANGLES 498. DBF. The projection of a point on a plane is the foot of the perpendicular drawn from that point upon the plane. The projection of a line upon a plane is the locus of the projection of... | |
 | Thomas Franklin Holgate - Geometry - 1901 - 462 pages
...edge from the same point, one in each boundary. § 430. (11) Projection of a Point upon a Plane — the foot of the perpendicular drawn from the point to the plane. § 445. (12) Projection of a Line upon a Plane — the locus of the projections of its points upon... | |
 | George Albert Wentworth - Geometry, Solid - 1902 - 248 pages
...not perpendicular to the plane MN. Hence, through AB only one plane can be passed -L to MN. 561. DBF. The projection of a point on a plane is the foot of the perpendicular from the point to the plane. 562. DBF. The projection of a line on a PROPOSITION XXIII. THEOREM. 563.... | |
 | Alan Sanders - Geometry - 1903 - 396 pages
...intersecting planes ? 878. DEFINITIONS. The projection of a point on a plane is the foot of the perpendicular from the point to the plane. The projection of a line on a plane is the locus of the projections of its points on the plane. 879. EXERCISE. The projection of a straight line on... | |
 | Alan Sanders - Geometry - 1903 - 392 pages
...locus of points in space that are each equally distant from two intersecting planes ? 878. DEFINITIONS. The projection of a point on a plane is the foot of the perpendicular from the point to the plane. The projection of a line on a plane is the locus of the projections of... | |
 | Joseph Harrison (A.M.I.C.E.) - Geometry - 1903 - 300 pages
...projection is spoken of without qualification, orthographic projection is always to be understood. Thus the projection of a point on a plane is the foot of the perpendicular let fall from the point to the plane. Notation. — We shall use a capital letter for a point in space,... | |
 | American School (Chicago, Ill.) - Engineering - 1903 - 390 pages
...which have the same area. 190. The projection of a point upon a straight line of indefinite length is the foot of the perpendicular drawn from the point to the line. An entire lino may be said to have a projection upon another line in the same way. 191. A medial... | |
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The projection of a point on a plane is the foot of the perpendicular from the point to the plane. 
