Puzzle

I saw this puzzle earlier today and thought it was clever enough to repost.

Without measuring and using only the information on the image, can you calculate the radius of the circle?

If you get the answer, say so in the comments, but don’t write the answer itself!

7 thoughts on “Puzzle”

  1. As engineers, we try to solve everything with equations…It took me like 6 minutes to realize that an equation was not going to do it… it’s simply a deduction and trial and error puzzle. Very clever.

    I like!

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