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?ABC is acute-angled.(a) Explain why there is a square PQRS with Pon AB, Q and Ron BC, and Son AC. (The intention here is that you explain in words why such a square must exist rather thanby using algebra.)(b) If AB = 35, AC = 56 and BC = 49, determine the side length of square PQRS. It maybe helpful to know that the area of ?ABC is 490?3.
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