## 3. |
A = 1/2 = .500 Trivial. One of an infinite family of solutions. Symmetric about a diagonal. |

## 4. |
A = 1/2 = .500 Trivial. Completely symmetric. |

## 5. |
A = √3 / 9 = .192+ Proved optimal by A. Dress, L. Yang, J. Z. Zhang, and Z. B. Zeng, 1992. Symmetric about a diagonal. |

## 6. |
A = 1/8 = .125 Proved optimal by A. Dress, L. Yang, J. Z. Zhang, and Z. B. Zeng, 1995. One of an infinite family of solutions. Vertically and horizontally symmetric. |

## 7. |
A = .0838+ Found by F. Comellas and J. Yebra, December 2001. Proved optimal by Zhenbing Chen and Liangyu Chen, 2008. Not symmetric. |

## 8. |
A = (√13-1) / 36 = .0723+ Found by F. Comellas and J. Yebra, December 2001. 180 |

## 9. |
A = (9√65-55) / 320 = .0548+ Found by F. Comellas and J. Yebra, December 2001. Symmetric about a diagonal. |

## 10. |
A = .0465+ Found by F. Comellas and J. Yebra, December 2001. Symmetric about both diagonals. |

## 11. |
A = 1/27 = .0370+ Found by Michael Goldberg, 1972. Horizontally symmetric. |

## 12. |
A = .0325+ Found by F. Comellas and J. Yebra, December 2001. Completely symmetric. |

## 13. |
A = .0270+ Found by Peter Karpov, August 2011. Not symmetric. |

## 14. |
A = .0243+ Found by Mark Beyleveld, August 2006. Symmetries of a rectangle. |

## 15. |
A = .0211+ Found by Peter Karpov, August 2011. Not symmetric. |

## 16. |
A = 7 / 341 = .0205+ Found by Mark Beyleveld, August 2006. 180 |

More information is available at Mathworld, and the article by Comellas and Yebra.

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