Gore, James Howard, 1856-1939 · New York, Longmans, Green, and co. · leaf 161
ss than OA, OB, and OC, it is the shortestdistance from the point to the plane. 336. COR. 2. Equal oblique lines from a point to a plane meetthe plane at equal distances from the foot of the perpendicular;and of two unequal oblique lines, the greater meets the plane atthe greater distance from the… … Let BA be perpendicular to AD and AC two intersectinglines in the plane MN, and let EA be any other line in JfJVpassing through the point of intersection of AD and AC. §343.] PLANES AND SOLID ANGLES. 149 To prove that BA is perpendicular to EA and hence per-pendicular to MN. Make AC equal to AD,…
Geometry
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