SOLUTION: Geometry really confuses me. Thanks for your help/: The diagonal of a square has length 20^2. What is the area of the square?

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Question 458247: Geometry really confuses me. Thanks for your help/:
The diagonal of a square has length 20^2. What is the area of the square?
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
each side=14.14
a=14.14^2
a=200 sq units