STRAIGHT LINES

Asked by devendra.mittal | 3rd Jan, 2010, 02:43: PM

Expert Answer:

Dear Student

Say the x,y co ordinates of B are (xb,yb)

 

Since x+y =5 is bisector of AB    ,  B(xb,yb) is reflection of  A(1,2 )  Over x+y=5.

To Get  Xb  

Substitute the X co-ordinate of A i.e. 1 in to x+y=5 resulting y is equal to Xb

1+Y=5    ==>       Y= 4  ==>    Xb=4

Similarly to Get  Xb  

Substitute the y co-ordinate of A i.e. 2 in to x+y=5 resulting x is equal to yb

X+2=5 ==>   X= 3  ==>  Yb= 3

B(4,3)

Regards

Team

Topperlearning

 

 

 

Answered by  | 7th Jan, 2010, 06:10: PM

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