Hart, C. A. (Clara Avis), b. 1863, Feldman, Daniel D., b. 1872 · New York, American Book Co · leaf 317
through the point of intersection of the given line and plane. 620. Def. A plane is perpendicular to a straiglit line if the line is perpendicular to the plane. 621. Def. If a line is perpendicular to a plane, its point ofintersection with the plane is called the foot of the perpendicular. 306…
Geometry, Plane · Geometry, Solid
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