# Three Equilateral Triangles and a Semi-Circle _Posted on Aug 2, 2019_ +-- {.image} [[ThreeEquilateralTrianglesandaSemiCircle.png:pic]] > The three equilateral triangles have sides of length $12$. What's the area of the semicircle? =-- * Thread [on twitter](https://twitter.com/Cshearer41/status/1157245700561866752) * [[three equilateral triangles and a semi-circle techniques]] * [[three equilateral triangles and a semi-circle solution]]