 | Robert Louis Short, William Harris Elson - Mathematics - 1911 - 216 pages
...is algebraic, aud is the most simple one known. 194. The projection of a point upon a straight line is the foot of the perpendicular drawn from the point to the line. Thus, the projection of the vertex of an isosceles triangle upon the base is the middle point... | |
 | George Clinton Shutts - Geometry - 1912 - 392 pages
...ab. Proof left to the pupil. 335. • PROJECTION OF A POINT. The * projection of a point upon a line is the foot of the perpendicular drawn from the point to the line. If AM is perpendicular to BC, then M is the projection of A upon BC. 336. PROJECTION OP A SECT.... | |
 | Joseph Harrison, George Albert Baxandall - Geometry, Descriptive - 1913 - 714 pages
...word "projection" is used without qualification, orthographic projection is 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. Referring again to Figs. 1 6 1 (a), 1 6 1 (b), the points a,... | |
 | Arthur Schultze, Frank Louis Sevenoak - Geometry - 1913 - 490 pages
...equidistant from the faces of a dihedral angle lies in a plane bisecting the dihedral angle. 536. DBF. The projection of a point on a plane is the foot of the perpendicular from the point to the plane. The projection of a figure upon a plane is the locus of the projections... | |
 | Sophia Foster Richardson - Geometry, Solid - 1914 - 236 pages
...respectively perpendicular are parallel to each other and are equidistant from ls. 125. Definition. The projection of a point on a plane is the foot of the perpendicular from the point to the plane. 126. Definition. The projection of a line on a plane is the locus of the... | |
 | Virgil Snyder, Charles Herschel Sisam - Geometry, Analytic - 1914 - 316 pages
...plane XOf; the plane ZOX; the X-axis; the T-axis; the origin. 2. Orthogonal projections. The orthogonal projection of a point on a plane is the foot of the perpendicular from the point to the plane. The orthogonal projection on a plane of a segment PQ of a line* is the... | |
 | Horace Wilmer Marsh, Annie Griswold Fordyce Marsh - Mathematics - 1914 - 270 pages
...Perpendicular to Another Plane, is a plane which forms a right dihedral angle with that plane. 138. The Projection of a Point on a Plane is the foot of a perpendicular from the point to the plane. 139. The Projection of a Line on a Plane is that part... | |
 | Webster Wells, Walter Wilson Hart - Geometry - 1916 - 490 pages
...the theorem is still true. Note 2. — If AB _L MN, an infinity of planes can be drawn through 503. The projection of a point on a plane is the foot of...drawn from the point to the plane. The projection of a given line on a plane is the line which contains the projections of all the points of the given line.... | |
 | Gerald Maxwell - Cartography - 1916 - 152 pages
...it is upon the same geometrical principles. REPEESENTATION OF FORM. It will be remembered that : 1. The projection of a point on a plane is the foot of the perpendicular let fall from that point on the plane. The horizontal projection of the point A is a. A t 62 Representation... | |
 | John H. Williams, Kenneth P. Williams - Geometry, Solid - 1916 - 184 pages
...hyp. 556. DBF. The projection of a point on a given plane is the foot of the perpendicular from that point to the plane. The projection of a line on a plane is the locus of the projections of all its points on that plane. The plane upon which a point or line is projected... | |
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The projection of a point on a plane is the foot of the perpendicular from the point to the plane. 
