# Semi-Circle and Quarter Circle in a Square _Posted on Aug 17, 2020_ +-- {.image} [[SemiCircleandQuarterCircleinaSquare.png:pic]] > A semicircle and quarter circle inside a square. How long is the black tangent line? =-- * Thread [on twitter](https://twitter.com/Cshearer41/status/1295292504909254658) * [[semi-circle and quarter circle in a square techniques]] * [[semi-circle and quarter circle in a square solution]]