# Triangle Centres and Square Corners _Posted on Oct 29, 2018_ +-- {.image} [[TriangleCentresandSquareCorners.png:pic]] > The corners of the red square are at the centres of the equilateral triangles. What's the total shaded area? =-- * Thread [on twitter](https://twitter.com/Cshearer41/status/1056969216916623360) * [[triangle centres and square corners techniques]] * [[triangle centres and square corners solution]]