Based on the combination of these terms, the user intent falls into three primary categories:
You want to know the height of a flagpole, but you have no ladder. You do have a mirror, a tape measure, and sunshine. How can you find the height without climbing?
Solution (spoiler‑free hint): Use the shadow as a proxy. Your height : your shadow length = flagpole height : flagpole shadow length. That’s a proportion—a proxy relationship.
Here are practical, safe methods (starting with the simplest):