In △ ABC, ∠ B = 90 °, ab = 7, BC = 24, AC = 25 A. 2B. 3C. 4D. 5

Let PE = pf = PG = XS △ ABC = 12 × ab × CB = 84, s △ ABC = 12ab × x + 12ac × x + 12bc × x = 12 (AB + BC + AC) · x = 12 × 56x = 28x, then 28x = 84, x = 3

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