If the side length of the triangle ABC is a, B, C, the square of a + the square of B + the square of C + 338 = 10A + 24B + 26c, try to judge the shape of the triangle

If the side length of the triangle ABC is a, B, C, the square of a + the square of B + the square of C + 338 = 10A + 24B + 26c, try to judge the shape of the triangle

A & sup2; + B & sup2; + C & sup2; + 338 = 10A + 24B + 26ca & sup2; - 10A + 25 + B & sup2; - 24B + 144 + C & sup2; - 26c + 169 = (a-5) & sup2; + (B-12) & sup2; + (C-13) & sup2; = 0, so a = 5, B = 12, B = 13, then a & sup2; + B & sup2; = C & sup2; according to the Pythagorean theorem, the triangle is a right triangle