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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