Gore, James Howard, 1856-1939 · New York, Longmans, Green, and co. · leaf 25
12 PLANE GEOMETRY. [BK. I. … PROPOSITION IV. THEOREM. 52. From a point outside a straight line only one perpendicularcan be drawn to such straight line, and this perpendicular is theshortest distance from the point to the line. Let P be the point, AB the line,and PO a perpendicular. 1. To prove that PO is the onlyperpendicular…
Geometry
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