Question

3 points A,B and C have co-ordinates (1,3) (3,5) and (-1,y) find the value of y when AB=AC

Answer 1

Answer:

Given mid-point of AB =(2,3) 

Thus,

23+x,25+y=(2,3) 

3+2x=2             and          5+2y=3

3+x=4                and           5+y=6

x=1                       and           y=1