1961 AHSME Problems/Problem 10
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Each side of triangle 
is 12 units. 
is the foot of the perpendicular dropped from 
on 
, and 
is the midpoint of 
. The length of 
, in the same unit, is:
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Each side of triangle is 12 units. is the foot of the perpendicular dropped from on , and is the midpoint of . The length of , in the same unit, is:
