Posted by Lindsay on Thursday, October 20, 2011 at 9:46pm.
sqrt [ ( x 2 - x 1 ) ^ 2 + ( y 2 - y 1 ) ^ 2 ]
L = sqrt [ ( 4 - ( - 2 ) ) ^ 2 + ( 1 - 7 ) ^ 2 ]
L = sqrt [ ( 4 + 2 ) ^ 2 + ( 1 - 7 ) ^ 2 ]
L = sqrt [ 6 ^ 2 + ( - 6) ^ 2 ]
L = sqrt ( 36 + 36 )
L = sqrt ( 72 )
L = sqrt ( 4 * 9 * 2 )
( Remark : sqrt ( 4 ) = 2 ; sqrt ( 9 ) = 3 )
L = 2 * 3 * sqrt ( 2 )
L = 6 sqrt ( 2 )
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