 | William Guy Peck - Geometry, Analytic - 1875 - 226 pages
...the origin, and the plane from which azimuths arc reckoned, being the plane xz. Of Projections. 92. The projection of a point on a line, is the foot of a perpendicular from the point to the line. Thus, B, C, and D (Fig. 52), are the projections of the... | |
 | Charles Davies, Adrien Marie Legendre - Geometry - 1885 - 538 pages
...parts. 3. A MEDIAN is a line drawn from any vertex of a triangle to the middle of the opposite side. 4. The PROJECTION of a point, on a line, is the foot of a perpendicular drawn from the point to the line. 5. The PROJECTION of one straight line on another,... | |
 | George Albert Wentworth - Geometry, Analytic - 1886 - 346 pages
...two are 135° and 60°, what is the third ? 214. Projections. The projection of a point upon a right line is the foot of the perpendicular from the point to the line ; or it is the intersection of the line with the plane through the point perpendicular to the line.... | |
 | James Edward Oliver - Trigonometry - 1890 - 186 pages
...if y=0, it is on the ж-axis ; if x = О, у = 0, it is at the origin. PROJECTIONS. The orthogonal projection of a point on a line is the foot of the perpendicular from the point to the line ; and, in this book, by projection is always meant orthogonal projection. The projection of a limited... | |
 | Henry Hunt Ludlow - Logarithms - 1891 - 322 pages
...01' 10", В = 45° 58' ”о", Л = 170.234 yds. PROJECTIONS OF STRAIGHT LINES AND PLANE FIGURES. 87. The projection of a point on a line is the foot of a perpen« dicular through the point to the line. The projection of a point on a plane is the point... | |
 | Charles Ambrose Van Velzer, George Clinton Shutts - Geometry - 1894 - 416 pages
...proposition may be expressed thus: If AC= AB — BC 277. The projection of a point upon a straight line is the foot of the perpendicular from the point to the line. The projection of a given straight line upon another straight line is that part of the second line... | |
 | Wooster Woodruff Beman, David Eugene Smith - Geometry - 1895 - 346 pages
...(1) and (5) A AEC = A ACK + i A ABC, (7) similarly, A CEB = A BLC + i A ABC, (8) .'. figure AEBC = figure ABLCK, (9) .'. A AEB = A BLC + A ACK. State...segment, A'B', cut off by the projections of A and B, the end-poiiits of AB. B' A' B' A' B' FIG. 1. FIG. 2. FIG. 3. FIG. 4. Strictly these are orthogonal (or... | |
 | George William Jones - Trigonometry - 1896 - 216 pages
...the risrht and sometimes to the left ? §3. PROJECTIONS. The orthogonal projection of a point upon a line is the foot of the perpendicular from the point to the line ; and, in this book, by projection is always meant orthogonal projection. The line on which the projection... | |
 | Henry W. Keigwin - Geometry - 1897 - 254 pages
...COR. 2. given polygon. To construct a square equivalent to a 319. DEF. The projection of a point upon a line is the foot of the perpendicular from the point to the line. 320. DEF. The projection of one line npon another is the length between the projections of the extremities... | |
 | John Henry Tanner, Joseph Allen - Geometry, Analytic - 1898 - 458 pages
...0)2 + (rsin <£sin ^)2 = ra. 17. Orthogonal projection. The orthogonal projection * of a point upon a line is the foot of the perpendicular from the point to the line. In the figure, M is the projection of P upon AB. The projection of a segment PQ of a FIG. 4.^ line... | |
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The projection of a point on a line is the foot of the perpendicular from the point to the line. Thus A 
