The 3D prism that produced the cross-section of a triangle is a triangular prism.
How to describe the 3D prism?
From the given figure, we can see that the cross-section is a triangle
One of the faces of a triangular prism is a triangle.
This means that when the triangular prism is cut vertically, a triangle face is created
Hence, the 3D prism that produced the cross-section of a triangle is a triangular prism.
Read more about cross-sections at:
https://brainly.com/question/3603397
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