设长方形底为2A,高为2B,中间那个共同顶点是中心点右移X,下移Y。列三个方程。
9 + 7 = 2AB + XB
9 + 8 = 2AB + YA
9 + 8 + 7 = 3AB + (XB + YA)/2
解出AB。
设长方形底为2A,高为2B,中间那个共同顶点是中心点右移X,下移Y。列三个方程。
9 + 7 = 2AB + XB
9 + 8 = 2AB + YA
9 + 8 + 7 = 3AB + (XB + YA)/2
解出AB。
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