[R] line

From: Sam R. Smith <samrobertsmith_at_yahoo.com>
Date: Mon 10 Oct 2005 - 15:35:30 EST

There are four points with coordinates:
How to use Python to draw one perpendicular bisector between (2,3) and (4,9); the other perpendicular bisector between (1,6)บอ(3,10); then, makes the output like:
l1 a b c
l2 a b c
(Note: l indicates the perpendicular bisector with equation ax + by = c.) Plus the intersection coordinates of the two perpendicular bisectors: x,y                 

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