What I like here is that its very similar structurally to this problem: http://mymathclub.blogspot.com/2015/07/sometimes-one-direction-is-lot-tricker.html
Both problems have the same asymmetric complexity. Both are solvable by essentially reflecting above or below the original figure. Even better, this version is not as hard the previous one which would make for a very nice progression if presented in sequence.
(Apology: I tried doing the whole explanation in Geogebra which doesn't scale as well as I intended. I recommend zooming in to read the figures)