Jawapan

2015-08-20T22:42:10+08:00
KL tower (8,6) is the midpoint of KLCC (-2,10) and building A. 

Let say KLCC is ( x_{1} , y_{1} )
and building A is ( x_{2} , y_{2} )

Midpoint (x,y) =  \frac{ x_{1} +  x_{2}  }{2} ,  \frac{ y_{1} +  y_{2}  }{2}

(8,6) =  \frac{ (-2) +  x_{2}  }{2} ,  \frac{ 10 +  y_{2}  }{2}

 \frac{ (-2) +  x_{2}  }{2} = 8
 (-2) +  x_{2} = 8 (2)
 x_{2}  = 16 + 2
 x_{2} = 18

 \frac{ 10 + y_{2} }{2} = 6
 10 + y_{2} = 6 (2)
 y_{2} = 12 - 10
 y_{2} = 2

Therefore, the coordinates of building A is (18,2)

tq MIMIKAYS VIRTUOSO
you are welcome, dhevashini. ^_^