Japanese temple geometry puzzle

What is the area of the square, if each circle has a radius equal to 5? Special thanks this month to: Mike Robertson, Daniel Lewis, Kyle, Lee Redden. Thanks to all supporters on Patreon!   / mindyourdecisions  

Gogeometry
https://www.gogeometry.com/problem/p3...
Sangaku
https://en.wikipedia.org/wiki/Sangaku
Andy Math
   • 2 Circles 1 Square  
Katayamahiko shrine 1873 sangaku. In the top row, the problem is the second from the left.
https://www.researchgate.net/figure/S...
Fukagawa Hidetoshi, Tony Rothman, "Sacred Mathematics: Japanese Temple Geometry" (Princenton University Press, 2008).

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