若所求面积为x^2, 两个三角形相似，相似比x:2, 总面积 2(x+2)/xx^2 = x^2+45; x=5

来源: got66 于 2026-05-06 05:59:42 [旧帖] [给我悄悄话] 本文已被阅读：次

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若所求面积为x^2, 两个三角形相似，相似比x:2, 总面积 2*(x+2)/x*x^2 = x^2+45; x=5