2010
Mathematics
JAMB
Find the distance between the points (1/2, 1/2) and (-1/2, -1/2).
A.
1
B.
0
C.
√3
D.
√2
Correct Answer: √2
Explanation
Let D denote the distance between (1/2, -1/2) then using D = √((x2-x1 )2+(y2-y1 )2 ) = √((-1/2-1/2 )2 + (-1/2-1/2 )2 ) = √((-1)2+(-1)2 ) = √(1+1) = √2
Let D denote the distance between (1/2, -1/2) then using D = √((x2-x1 )2+(y2-y1 )2 ) = √((-1/2-1/2 )2 + (-1/2-1/2 )2 ) = √((-1)2+(-1)2 ) = √(1+1) = √2THIS WEEK's
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