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Question
Find the distance between the following pairs of point in the coordinate plane :
(13 , 7) and (4 , -5)
Solution
A = (13 , 7) , B = (4 , -5)
AB = `sqrt (("x"_2 - "x"_1)^2 + ("y"_2 - "y"_1)^2)`
` = sqrt ((4 - 13)^2 + (-5-7)^2)`
`= sqrt (81 + 144)`
`= sqrt 225`
= 15 units.
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