Final answer:
A square prism and a pentagonal pyramid can each have exactly two planes of symmetry, while a dodecahedral shape does not meet this criterion.
Explanation:
Square Prism and Pentagonal Pyramid could have exactly two planes of symmetry. A square prism can have two planes of symmetry passing through the midpoints of opposite edges, and a pentagonal pyramid can have two planes of symmetry passing through the midpoints of opposite edges as well. On the other hand, a Dodecahedral shape does not have exactly two planes of symmetry, making it different from the other options.
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