Sangaku is a
Japanese
tradition of
celebrating
geometrical beauty, popular during the Although most of these sangaku were lost, almost nine hundred survive, scattered all throughout Results that may be useful Here is an impassioned plea for returning Mathematics to its rightful place among the Arts by a radical revision of Mathematics education: A Mathematican's Lament 

Below are examples of sangaku for your problem solving enjoyment!  More difficult problems 

Circle,
Triangle & Square Circle & 2 Squares Square & 2 Circles Circle of Coins Circle & 2 Triangles 4 Circles 16 Circles 8 Circles 6 Circles, Square & Triangle 
Three
Incircles 2 Circles & 2 Squares Three Circles 
Ten
Circles 11 Circles Triangle & 4 Circles 