Definition
(x _{2}, y_{2}) is given by,

Example Problem
Given the points ( 1, 2 ) and ( 3, 5 ), find the distance between them. 
Solution
Label the points as follows ( x_{1}, y_{1} ) = ( 1, 2 ) and ( x_{2}, y_{2} ) = ( 3, 5 ). Therefore, x_{1} = 1, y_{1} = 2, x_{2} = 3, and y_{2} = 5. To
find the distance d between the
points, use the distance formula : 
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