NONO NONO's answer to A's Junior College 2 H2 Maths Singapore question.
I saw that you had posted this before but without the graph and some key information to solve it. Now with all the info in hands I was able to solve.
As a side comments, s and r are parallels but just don't go to the same directions.
Yup, also known as antiparallel
Oh didn't know that - thanks J :-)
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