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Geometric problem
Posted:
Jul 29, 2013 3:38 AM


> ABC is an equilateral triangle.on BC side we build BDC triangle such > that <BDC = 30.from the vertex A we construct a 30 degree angle such > that each ray intersects the sides DB and DC of triangle BDC in the > points E and F respectively, i.e <EAF = 30. > How we prove that: BE^2 + CF^2 = EF^2 ?
> http://at.yorku.ca/cgibin/bbqa?forum=homework_help;task=list



