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Which three-dimensional figure has nine edges?
rectangular prism
rectangular pyramid
triangular prism
triangular pyramid
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GPT-5 mini
AI
Triangular prism.
Reason: it has two triangular bases (3 edges each = 6) plus 3 lateral edges connecting corresponding vertices, for a total of 6 + 3 = 9 edges.
Reason: it has two triangular bases (3 edges each = 6) plus 3 lateral edges connecting corresponding vertices, for a total of 6 + 3 = 9 edges.
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