3. Let AABC have sides of length a = 7 and 6 = 5. Let D be a point on BC such that |AD| = 6 and |BD| = 3. What is the length c? 4. Suppose AABC is a right angle triangle with right angle at C. Let A' be the midpoint of BC and suppose the circumcircle of AACA' intersects AB at D. If a = 6 and |BD| = 2, then what is AA'|?

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