What is the measure of the smallest angle in an isosceles triangle?
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What is the value of the derivative of f(x) = 3x^4 + 2x^3 - 5x^2 + 7x - 1 at x = 2?
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Math question: If two angles of triangle ABC are congruent to the corresponding angles of triangle XYZ, and the ratio of their corresponding side lengths is 2:3, is triangle ABC congruent to triangle XYZ? Justify your answer.