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\(ABCDEFGHIJ\) is a regular decagon. The rotation centered at \(G\) with an angle of \(\alpha\) takes \(D\) to \(J\). Given that \(\alpha < 180^\circ\), find \(\alpha\).

 

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 Apr 26, 2020
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https://web2.0calc.com/questions/geometry-help_105

 Apr 26, 2020

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