Triangles with an angle of 120.C2.B0 Eisenstein triple

-


triangle 120° angle , integer sides


a similar special case of law of cosines relates sides of triangle angle of 120 degrees:








c

2


=

a

2


+
a
b
+

b

2


.


{\displaystyle c^{2}=a^{2}+ab+b^{2}.}



examples of such triangles include:









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