設長方形底為2A,高為2B,中間那個共同頂點是中心點右移X,下移Y。列三個方程。
9 + 7 = 2AB + XB
9 + 8 = 2AB + YA
9 + 8 + 7 = 3AB + (XB + YA)/2
解出AB。
設長方形底為2A,高為2B,中間那個共同頂點是中心點右移X,下移Y。列三個方程。
9 + 7 = 2AB + XB
9 + 8 = 2AB + YA
9 + 8 + 7 = 3AB + (XB + YA)/2
解出AB。
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