This is a delightful problem. Find the area of the triangle defined by the four squares. It seems impossible but it can be solved with the right perspective. Can you figure it out?

Sources
Puzzle by Catriona Shearer
https://twitter.com/Cshearer41..../status/102784451533

I read it on the blog Math With Bad Drawings.
https://mathwithbaddrawings.co....m/2018/10/03/twenty-

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