What is the circle’s radius? Nice question from Australia

Three squares are formed on the three sides of an equilateral triangle. Each square has a side length equal to 1. What is the radius of the circle that circumscribes the squares? Thanks to Royce for the suggestion! This comes from the 2021 Colin Doyle Mathematics Competition in Australia. Subscribe: Send me suggestions by email (address at end of many videos). I may not reply but I do consider all ideas!