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What is the area, in square units, of the square with the four vertices at $A\ (0, 0)$, $B\ (-5, -1)$, $C\ (-4, -6)$ and $D\ (1, -5)$?

 Apr 10, 2021
 #1
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Easy!  The area of the square is 18.

 Apr 10, 2021
 #2
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That is wrong

 Apr 10, 2021
 #3
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Use Pythagoras to get the length of one side, then square it to get the area.

 Apr 10, 2021

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