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To calculate the average rainfall using the Thiessen polygon method, we need to apply the following formula: \[ \text{Average Rainfall} = \frac{\sum (R_i \times A_i)}{\sum A_i} \] Where: - \( R_i \) is the rainfall at station \( i \), - \( A_i \) is the area of the polygon corresponding to station \( i \). ### Data from the table: | ______ ______ ______ ___ ________ ______ _____ __________.
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