# Three Adjacent Triangles _Posted on Apr 10, 2019_ +-- {.image} [[ThreeAdjacentTriangles.png:pic]] > Each equilateral triangle has been divided into pieces of equal area. What's the missing length? =-- * Thread [on twitter](https://twitter.com/Cshearer41/status/1115917680027021312) * [[three adjacent triangles techniques]] * [[three adjacent triangles solution]]