title: Moss's egg
text: # Moss's egg
  
  In Euclidean geometry, Moss's egg is an oval made by smoothly connecting four circular arcs. It can be constructed from a right isosceles triangle ABC with apex C.
  
  To construct Moss's egg:
  
  * Draw a semicircle on the base AB of the triangle, outside of the triangle.
  * Connect it to a circular arc centered at B from A to a point D on line BC, and by another circular arc centered at A from B to a point E on line AC.
  * Complete the oval by a circular arc centered at C, from D to E.
  