Math question: In triangle ABC, if angle A is 70 degrees and the circle with center at A intersects AB and AC at points P and Q, respectively, calculate the measure of angle APQ.
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What is the equation of an ellipse with a major axis length of 6, minor axis length of 4, and centered at (2, 3)?
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Question: What is the surface area of a sphere with radius 'r' and volume 'V'?