(3) / / ... ( )Prove that
(12-25-2013), (12-25-2013), (12-25-2013)
; 12-25-2013 03:34 PM
(3) - 24 - *Q4 ()
(12-26-2013), (12-25-2013)
Cn , np Geometric Constructions - - : -
: 1 (0 1 )
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