# Multiple Semi-Circles IV _Posted on Feb 16, 2021_ +-- {.image} [[MultipleSemiCirclesIV.png:pic]] > The three smallest semicircles are the same size. The area of the red semicircle is $10$. What’s the total yellow area? =-- * Thread [on twitter](https://twitter.com/Cshearer41/status/1361660455564017668) * [[multiple semi-circles iv techniques]] * [[multiple semi-circles iv solution]]