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March 3, 2015

March 3, 2015

Posted by **Anonymous** on Friday, February 1, 2013 at 2:30pm.

- geometry -
**Reiny**, Friday, February 1, 2013 at 2:42pmTricky little question.

On my second attempt at the diagram I realized that in triangle BDC , the central angle had to be 90°

So the diagram really just consists of a square with sides 2.

So without any further calculations because of the properties of a square

AB = 2

The key lies in a proper diagram.

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