# Quadrilateral Splitting a Semi-Circle _Posted on Apr 1, 2020_ +-- {.image} [[QuadrilateralSplittingaSemiCircle.png:pic]] > In total, the blue arcs have the same length as the red. What’s the sum of these two angles? =-- * Thread [on twitter](https://twitter.com/Cshearer41/status/1245268688753823744) * [[quadrilateral splitting a semi-circle techniques]] * [[quadrilateral splitting a semi-circle solution]]