find the distance between two lines x+y=2 & 2x+2y=6 .
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two lines are parallel if
a1/a2 = b1/b2 ≠ c1/c2
the distance between two parallel lines ax+by+c1=0 and ax+by+c2=0 is
D = |c1 - c2| / √a²+b²
then the given lines x+y=2 & 2x+2y=6 are parallel
x+y=2
x+y=3
D = |2-3| /√1²+1²
D = 1/√2
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