Thursday, October 17, 2013

`(1, 1), y = x + 1` Find the distance between the point and the line.

Given (1, 1) `y=x+1`


`y=x+1`


`-x+y-1=0`



Let A=-1, B=1, C=-1, x1=1, y1=1



Find the distance between the point and the line using the formula


`d=|Ax_1+By_1+C|/sqrt(A^2+B^2)`


`d=|(-1)(1)+(1)(1)+(-1)|/sqrt((-1)^2+1^2)`


`d=|-1+1-1|/sqrt(2)=1/sqrt(2)=.707`



The distance between the point and the line is .707 units.

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