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因為中線長是2 所以斜邊4 所以兩直角邊和是4倍的根號3 a+b=4倍的根號3 所以(a+b)*2=48 a*2+2ab+b*2=48 因為a*2+b*2=16 所以2ab=32 ab=16 s=ab/2=8
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