Assertion: prism's shape | /r/HasProperty | that of a triangular prism
Facets:
Source sentences:
text: The traditional geometrical shape of an optical prism is that of a triangular prism with a triangular base and rectangular sides, and in colloquial use "prism" usually refers to this type.
text: The traditional geometrical shape of an optical prism is that of a triangular prism with a triangular base and rectangular sides, and in colloquial use "prism" usually refers to this type.