Here superimposed upon one another are; club, heart, spade, and clover symbols which are found in an ordinary deck of playing cards. All 4 symbol designs came from out of 11 inscribed circles as shown here.
Area of a triangle in terms of the inscribed circle or incircle radius,
Inscribed Circle And Square Puzzle – Mind Your Decisions
Geometry problems involving circles inscribed in regular hexagons and regular hexagons inscribed in circles can be solved the same way as problems involving circles and equilateral triangles. The key geometric properties are that a regular hexagon.