# Two Semi-Circles in a Square _Posted on Apr 22, 2019_ +-- {.image} [[TwoSemiCirclesinaSquare.png:pic]] > The area of the square is $100$. What's the missing length? =-- * Thread [on twitter](https://twitter.com/Cshearer41/status/1120226372570501120) * [[two semi-circles in a square techniques]] * [[two semi-circles in a square solution]]