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Old 08-24-2010, 10:45 AM
  #9  
bearisgray
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Join Date: May 2008
Location: MN
Posts: 24,440
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To rectangle it up -

the side triangles will have 30, 30, and 120 degree angles

the four sided "corner" pieces will have 90, 90, 60, and 120 degree angles.
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