SOLUTION: Which of the following points is not at a distance of 1 unit from the origin? A (0,1) B (1,0) C (0,-1) D (-1,0) E (1,1)

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Question 966993: Which of the following points is not at a distance of 1 unit from the origin?
A (0,1)
B (1,0)
C (0,-1)
D (-1,0)
E (1,1)

Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Distance formula is D%5E2=%28x-0%29%5E2%2B%28y-0%29%5E2=1
x%5E2%2By%5E2=1
So if either x is 1 or y is 1, with the other coordinate equal to zero, you're good.
But both x and y cannot be one.
1%2B1%3C%3E1