In triangle abc, m∠bac = 50°. if m∠acb = 30°, then the triangle is triangle. if m∠abc = 40°, then the triangle is triangle. if triangle abc is isosceles, and ab = 6 and bc = 4, then ac = .

AC=6. I think, because ABC - isosceles, so two sides must have same lengths.

what are ur choices?

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times both sides by 2, times () by 8, add alile terms, move terms, add alike and caculate divide both sides by 3