# Rectangles in Concentric Rings _Posted on Aug 9, 2019_ +-- {.image} [[RectanglesinConcentricRings.png:pic]] > Each rectangle is tangent to two of the concentric circles. If the inner blue right has area $4$, what's the purple area? =-- * Thread [on twitter](https://twitter.com/Cshearer41/status/1159859547403706369) * [[rectangles in concentric rings techniques]] * [[rectangles in concentric rings solution]]