Applying a right-hand rule: palm at P0P_0P0, finger pointing P1P_1P1, then your thumb is pointing to the perpendicular vector ⇔\Leftrightarrow⇔ positive.
@ML2000_LT -- very relevant, and exactly right. Thank you!
I lightly edited your comment to use Markdown to typeset the math symbols. Give it a go in future comments!
Applying a right-hand rule: palm at P0, finger pointing P1, then your thumb is pointing to the perpendicular vector ⇔ positive.
@ML2000_LT -- very relevant, and exactly right. Thank you!
I lightly edited your comment to use Markdown to typeset the math symbols. Give it a go in future comments!