Originally Posted by
smd4
Axes don’t need to intersect for them to be 90 degrees apart.
Listen, you have admitted that your geometry chops may be a little off; I’m sure you can take a rudimentary geometry class at the local community college.
Sounds like you are imagining planes going through the two that can be ninety degrees to each other. There are also planes that can go through them both that are parallel to each other.
If two lines don't intersect, then can't be perpendicular. There is a line from the midpoint of the cord that is perpendicular to the chord and also intersect the center of the circle. I just don't get why perpendicular really applies here and your rudimentary geometry knowledge can't even come up with a logical reason you can relate to me, and much less a theorem.