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I am hoping someone can help me with a proof for the following conjecture:
If a triangle has sides with lengths (a,b,c) and sides (a,b) enclose an angle of 120 degrees, then:
a^2+ab+b^2=c^2
Mahalo
If a triangle has sides with lengths (a,b,c) and sides (a,b) enclose an angle of 120 degrees, then:
a^2+ab+b^2=c^2
Mahalo