What are the characteristics of the circle defined by the equation x^2 + y^2 = r^2? How does the radius r relate to the distance of any point (x, y) on the circle from the origin?
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What is 150 milliliters converted to liters?
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Find the measure of angle A in a triangle ABC, if the angle bisector of angle A divides the opposite side into segments 3 and 5.