Davies, Charles, 1798-1876 · New York and Chicago, A. S. Barnes and company · leaf 119
from apoint to a plane. Let A be a point above the planeDE, and AB a. line drawn perpen-dicular to the plane : then will A B beshorter than any oblique line A C. For, tlirough B, the foot of the per-pendicular, draw BC to the pointwhere the oblique line A C meets theplane. Now, since A B is… … BOOK V 11G Of Planes. Cor It is evident that if several lines be drawn from thepoint A to the plane, that those which are nearest the perpen-dicular AB, will be less than those more remote. Sch. The distance from a point to a plane is measured ondie perpendicular: hence, when the distance only is…
Geometry · Plane trigonometry
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