Jawabanmu

2014-04-22T21:34:14+07:00
1)1/2d2=√20^2-12^2=√256=16... d2=32 L=1/2*d1*d2=1/2*24*32=384.............. 2)m=-a/b=-4/4=-2………………………………… y-b=m(x-a)……………………………………………… y-5=-2(x-0)……………………………………………… y-5=-2x......... 2x+y-5=0