Question

Titik A ( 5,-4 ) B ( 2,-8 ) C ( K,12 ) Pada garis yang sama tentukan nilai K

Answer 1

y-y1 = x-x1
y2-y1  x2-x1
= y-(-4) = x-5
   -8-(-4)   2-5
y+4 = x-5 di perkalian silang
-4        -3

<=> -3(y+4) = -4(x-5)
<=> -3y+12=-4x+20
<=> -3y+4x=20-12
<=> -3y+4x=8

K=x
-3X12+4k=8
-36+4k=8
4k=36+8
4k=44
k=44
    4
k=11