Assertion: polyhedron's plane | /r/MadeOf | one of its faces
Facets:
Source sentences:
text: A polyhedron is said to be convex if it lies entirely on one side of any plane containing one of its faces; then the faces are also convex.
text: A polyhedron is said to be convex if it lies entirely on one side of any plane containing one of its faces; then the faces are also convex.
text: A polyhedron is said to be convex if it lies entirely on one side of any plane containing one of its faces; then the faces are also convex.