Beginner: Transform Vector

I am a beginner trying to learn dynamo in my spare time. I am trying to create a line that will always be perpendicular to another line within the x,y plane. I am trying to use the Vector.Transform, but I am not sure how to input the CoordinateSystem.

I am not entirely sure if this will work let alone the best way so I am open to other ways.
Thanks for any assistance you can give.

I believe there’s already a node that will give you the normal direction of a point on a curve.

Nevermind, I found what I needed. I needed Vector.Rotate


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