So it may be an isosceles triangle (a=b)
Respondents: Anonymous 2009-11-419:15.
Solution: Because A 2C 2-B 2C 2 = A 4-B 4, ...
So c 2 (a 2-b 2) = (a 2+b 2) (a 2-b 2) ...
If A 2 ≠ B 2, then C 2 = A 2+B 2, ...
That is, triangle ABC is a right triangle.
If a 2 = b 2 means a 2-b 2 = 0 (a+b) (a-b) = 0 a = b. ...
Triangle ABC is an isosceles triangle.
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