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1-3/3+2 = -2/5
nah kan tegak lurus, jadi gradien K sama L kalo dikali jadi -1
m1 . m2 = -1
-2/5 . m2 = -1
m2 = 5/2
nah selanjutnya sama kaya diatas. make yg C sama D
5 = d - 5
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2 = -2+6
5(4) = 2d -10
20 + 10 = 2d
d = 15
t nya sama caranya