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April 20, 2014

April 20, 2014

Posted by **emergency!!! 33** on Monday, February 11, 2013 at 1:26am.

- geometry -
**Steve**, Monday, February 11, 2013 at 4:55am∠ADE = 90-17 = 73°

∠ECD = ∠CEB = 29°

∠DEC = 180 - (73+29) = 78°

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