A traditional funnel for pouring fluids or small particles has 3 edges and no corners. A ship's funnel will have 2 edges and no corners.
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The corner on a shape where edges meet is called a vertex.
VERTEX
A cube has twelve edges.
there are zero edges
the vertex is where the two or more edges meet so to find them just count the corners because every corner is a vertex. a cube has 8 Vertices