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Explanation & Answer
Adjacent angles of a rhombus are supplementary.
Therefore, ∠E + ∠D = 180º
8w - 80º + 2w = 180º
10w - 80º = 180º
10w = 180º + 80º
10w = 260º
w = 260º/10
w = 26º
So, m∠E = 8w -80º = 8*26º - 80º = 208º - 80º = 128º
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