2015 UMO Problems/Problem 6

Revision as of 02:03, 6 November 2015 by Timneh (talk | contribs)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)

Problem

A triangular pyramid with apex $O$ and base $\triangle{ABC}$ has the property that the perimeter of $\triangle {ABC}$ is $84$. Additionally, one can place a cylinder of radius $4$ and height $10$ completely inside the pyramid such that one of its bases is in the same plane as $\triangle{ABC}$. What is the minimum possible height from $\triangle{ABC}$ to apex $O$? Show that this height is achievable.


Solution

See Also

2015 UMO (ProblemsAnswer KeyResources)
Preceded by
Problem 5
Followed by
Last Problem
1 2 3 4 5 6
All UMO Problems and Solutions