SOLUTION: The sides of a triangle are x,y and √x^2+y^2 +xy. Find the greatest angle

Question 1167410: The sides of a triangle are x,y and √x^2+y^2 +xy. Find the greatest angle
Found 2 solutions by Alan3354, ikleyn:
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
not clear what's under the radical.
Answer by ikleyn(52776) (Show Source): You can put this solution on YOUR website!
.

Apply the cosine law x^2 + y^2 - 2xy*cos(a) = x^ 2 + y^2 + xy, where "a" is the angle between the sides x and y. It gives, after reducing -2xy*cos(a) = xy cos(a) = a = = 120 degrees. ANSWER

Solved.

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