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September 2, 2014

September 2, 2014

Posted by **angela** on Wednesday, June 27, 2012 at 8:54am.

- geometry -
**Steve**, Wednesday, June 27, 2012 at 10:32amDEF + ABC = 90

DEF + 9DEF = 90

10DEF = 90

DEF = 9

ABC = 81

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