Puzzle Command
Daily Puzzle
Diagonal Line
December 10, 2014
Diagonal Line
Diagonal Line

As shown in the image, there is a circle. 

Inside circle the there is a rectangle with points ABCD. Assuming that point C is in the center of the circle. How long is the diagonal line AD?

Puzzle Notes
You don't need the Pythagorean Theorem to answer this question.
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