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" The projection of a point on a plane is the foot of the perpendicular drawn from the point to the plane. "
The elements of geometry, in eight books; or, First step in applied logic - Pagina 43
door L J V. Gerard - 1874
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Elements of Geometry: Plane and Solid

John Macnie - 1895 - 374 pagina’s
...equivalent to the sum of those on the arms. 349. DEFINITIONS. The projection of a point upon an indefinite straight line is the foot of the perpendicular drawn from the point to the line. Thus P is the projection of the point A upon MN. M PLANE GEOMETRY. — BOOK V. The projection of a...
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Plane Geometry

George D. Pettee - 1896 - 253 pagina’s
...diagonal, this diagonal is bisected by the other. DEFINITIONS 261. The projection of a point upon a line is the foot of the perpendicular drawn from the point to the line, as D is the projection of A upon the line BC, in the figures below. 262. The projection of a line upon...
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Elements of Geometry

Andrew Wheeler Phillips, Irving Fisher - 1896 - 540 pagina’s
...intersecting lines AB and BB'. § 526 III QED 582. Def. — The projection of a point upon a plane is the foot of the perpendicular drawn from the point to the plane. Thus A' is the projection of the point A upon the plane MN. 583. Dcf. — The projection of...
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Elements of Geometry

Andrew Wheeler Phillips, Irving Fisher - 1896 - 540 pagina’s
...intersecting lines AB and BB'. § 526 III QED 582. Def. — The projection of a point upon a plane is the foot of the perpendicular drawn from the point to the plane. Thus A' is the projection of the point A upon the plane MN. 383. Def. — The projection of...
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Plane and Solid Geometry: Inductive Method

Arthur A. Dodd, B. Thomas Chace - 1898 - 406 pagina’s
...21, what is the homologous side of the second? 230. Definition. (1) The projection of a point upon a straight line is the foot of the perpendicular drawn from the point to the line. (2) The projection of a finite straight line upon a line is that portion of the second line included...
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The Essentials of Geometry (plane)

Webster Wells - 1898 - 242 pagina’s
...the centre ? DEFINITIONS. 275. 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. Thus, if line AA' be perpendicular to line CD, the projection of point A on line CD is point A'. u...
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The Elements of Plane Geometry

Charles Austin Hobbs - 1899 - 240 pagina’s
...to the hypotenuse is p; prove that -1 = 1 + 1. 2 2 a PROJECTION. 185. The projection of a point upon a straight line is the foot of the perpendicular drawn from the point to the line. For example, the projection of the point C upon the line AB is the point E. In case a point lies in...
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The Essentials of Geometry

Webster Wells - 1899 - 395 pagina’s
...— BOOK III. DEFINITIONS. 275. 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. Thus, if line AA' be perpendicular to line CD, the projection of point A on line CD is point A'. CA...
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The Essentials of Geometry

Webster Wells - 1899 - 395 pagina’s
...number of planes can be drawn through ABħMN (§ 441). 447. Defs. TJie projection of a point on a plane is the foot of the perpendicular drawn from the point to the plane. The projection of a line on a plane is the line which contains the projections of all its points....
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The Essentials of Geometry

Webster Wells - 1899 - 395 pagina’s
...plane can be drawn through ABJLMN, unless AB is _L MN. 447. Def s. The projection of a point on a plane is the foot of the perpendicular drawn from the point to the plane. The projection of a line on a plane is the line which contains the projections of all its points....
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