Here I show the smallest polyiamond with full symmetry that can be tiled by a pentiamond and a heptiamond, using at least one copy of each. The solutions shown are not necessarily uniquely minimal.
See also Baiocchi Figures for Pentiamond-Hexiamond Pairs.
Carl Schwenke and Johann Schwenke contributed solutions.
5I+7A : 72 | 5J+7A : 66 | 5Q+7A : 36 | 5U+7A : 72 |
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5I+7B : 54 | 5J+7B : 24 | 5Q+7B : 54 | 5U+7B : 66 |
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5I+7C : 24 | 5J+7C : 24 | 5Q+7C : 24 | 5U+7C : 24 |
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5I+7D : 24 | 5J+7D : 54 | 5Q+7D : 24 | 5U+7D : 36 |
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5I+7E : 72 | 5J+7E : 54 | 5Q+7E : 36 | 5U+7E : 72 |
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5I+7F : 36 | 5J+7F : 36 | 5Q+7F : 72 | 5U+7F : 24 |
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5I+7G : 48 | 5J+7G : 24 | 5Q+7G : 36 | 5U+7G : 72 |
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5I+7H : 54 | 5J+7H : 54 | 5Q+7H : 36 | 5U+7H : 66 |
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5I+7I : 24 | 5J+7I : 54 | 5Q+7I : 48 | 5U+7I : 72 |
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5I+7J : 24 | 5J+7J : 24 | 5Q+7J : 48 | 5U+7J : 72 |
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5I+7K : 72 | 5J+7K : 36 | 5Q+7K : 54 | 5U+7K : 72 |
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5I+7L : 72 | 5J+7L : 54 | 5Q+7L : 48 | 5U+7L : 72 |
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5I+7M : 72 | 5J+7M : 54 | 5Q+7M : 54 | 5U+7M : 66 |
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5I+7N : 66 | 5J+7N : 54 | 5Q+7N : 24 | 5U+7N : 66 |
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5I+7P : 72 | 5J+7P : 54 | 5Q+7P : 72 | 5U+7P : 72 |
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5I+7Q : 36 | 5J+7Q : 36 | 5Q+7Q : 54 | 5U+7Q : 72 |
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5I+7R : 24 | 5J+7R : 72 | 5Q+7R : 48 | 5U+7R : 72 |
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5I+7S : 66 | 5J+7S : 54 | 5Q+7S : 36 | 5U+7S : 72 |
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5I+7T : 72 | 5J+7T : 24 | 5Q+7T : 54 | 5U+7T : 72 |
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5I+7U : 72 | 5J+7U : 54 | 5Q+7U : 54 | 5U+7U : 72 |
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5I+7V : 54 | 5J+7V : 54 | 5Q+7V : 54 | 5U+7V : 66 |
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5I+7X : 72 | 5J+7X : 66 | 5Q+7X : 96 | 5U+7X : 72 |
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5I+7Y : 54 | 5J+7Y : 54 | 5Q+7Y : 72 | 5U+7Y : 24 |
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5I+7Z : 72 | 5J+7Z : 54 | 5Q+7Z : 36 | 5U+7Z : 72 |
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Last revised 2025-03-12.