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The trick for me was to move one triangle around over the other until only three coins didn't overlap.

I think am misunderstanding the problem because I have convinced myself that it can not have a valid solution.

I had one fake AHA moment and but then it was gone again. Not sure what that says about me.

Edit and spoiler warning: Looked up the solution and I think the picture is misleading. It implies that pyramid staying on same height.

The background of paper with lines is very misleading - because it implies that translation of the pyramid is forbidden, when this translation is the key.

I agree, although it's not the lines for me but the boundary of the page itself.

There is always some kind of consideration like that for these types of trick problems.

It's a good insight for any transformation really, including change in code: look at what's in common between the desired outcome and the current situation to have an idea how how much work to do.

I feel like I'm broken. I got the problem fairly quickly but had no aha moment!