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Eric Chu · Answer 1 · 2017-06-02T14:09:07+0000

by the pythagorean theorem we get that 2^2+4^2=20, so the diagonal side length is \sqrt{20}=2\sqrt{5}.

The perimeter is 4(2\sqrt{5})=8\sqrt{5}
The area is (2*4/2)*4=16

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