l e n g t h o f d ia g o na l = 2 s i d e s i d e = 10 y d l e n g t h o f d ia g o na l = 10 2 y d
The length of the diagonal of a square with side length 10 yards is 10 2 yards. This is found using the Pythagorean theorem. Simplifying 200 gives the final answer.
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