AB*CD + AC*BD = AD*BC
AB,AC和BD已知,AD和BC可由勾股定理計算得出,代入上述等式,可計算得出 CD = 7
AB*CD + AC*BD = AD*BC
AB,AC和BD已知,AD和BC可由勾股定理計算得出,代入上述等式,可計算得出 CD = 7
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