The answer is orthogonal lines, or c. This is because orthogonal lines are not use, and they aren't needed either. There are no orthogonal lines, especially because you can't exactly use them here.
I just took the quiz for the unit and got it wrong. The answer is D. Trust Me.
Hope this helps you guys.
Answer:
the study of the properties of moving air and the interaction between the air and solid bodies moving through it.
Explanation:
charles Ives is the right answer on apex
Answer: D
true
