Bantu 2 soal INI ya :)
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garis y =-2x+3
m=-2
tapi diminta tegak lurus jadi
m = -1:-2
m=1/2
PERSAMAAN GARIS
y-y1 =m ( x-x1)
y-5=1/2(x-(-2) )
--------------------------------------- x2 (dikali 2 biar ngilangin per duanya)
2y-10=(x+2)
2y=x+12
2. 72/360 . 22/7 .21 = 2,64