Question 9
Let $ABCDA'B'C'D'$, be a cube with side length $a$. Let $M$ and $P$ be the midpoints of the edges $[AB]$ and $[DD']$, respectively.
a) Prove that $MP \perp A'C$.
b) Find the distance between the lines $MP$ and $A'C$.
a) Prove that $MP \perp A'C$.
b) Find the distance between the lines $MP$ and $A'C$.