What is the measure of angle A in a triangle with angles 50 degrees and 80 degrees?
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Find the length of an adjacent side in a right triangle with a hypotenuse of 8 units and an angle of 45 degrees.
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What is the equation of the quadratic function represented by the graph: a parabola opening downwards, with vertex (-3, 2) and x-intercepts (-1,0) and (-5,0)?