Suppose I have an $n-1$ dimensional convex hypersurface $\Omega$ in $\mathbb{R}^n$ and I know $o\notin\Omega$ and $\Omega$ is contained in some closed half space.
Is it true that I can always choose a direction $v$ such that
- $\Omega \subset \{x\in \mathbb{R}^n: x\cdot v\leq 0\}$ and
- $o$ is in the the interior of the image of the orthogonal projection of $\Omega$ onto $v^\perp$?