Mathematics
Junior High
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請問這一題該怎麼算
三、非選擇題-計算:每題7分,共28分
1.如右圖,圓外切四邊形ABCD,已知AB=A
16,BC=7-2x,CD=x+4,AD=5x+7,
則四邊形ABCD 的周長=?
【解】
BC
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