What is the formula to find the measure of an angle inside a triangle?
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Question: What is the area, in terms of x, of a circle with radius x, minus the area of a rectangle with length 2x and width x, plus the area of a parallelogram with base 3x and height x?
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Math question: What is the equation of a parabola with vertex (2,3) that opens downwards and has a focal length of 4 units?