True or false?

Background: The geometry problem pictured below, which popped up in my Twitter feed, was originally assigned on a seven-year-old’s math homework. For my part, I thought at first that the answer had to be “false,” but after seeing some of the replies in this fascinating thread, a thread which contains many deep mathematical insights, I have changed my answer to “true”!

Screen Shot 2021-02-26 at 9.29.11 AM

About F. E. Guerra-Pujol

When I’m not blogging, I am a business law professor at the University of Central Florida.
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