# Three Triangles and a Rectangle Inside a Circle _Posted on Mar 30, 2019_ +-- {.image} [[ThreeTrianglesandaRectangleInsideaCircle.png:pic]] > Three equilateral triangles and a rectangle are stacked up inside this circle. What's the angle? =-- * Thread [on twitter](https://twitter.com/Cshearer41/status/1111918671868375040) * [[three triangles and a rectangle inside a circle techniques]] * [[three triangles and a rectangle inside a circle solution]]