babies
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An angle is formed when two rays meet.
These are the points where three faces meet.
In 2 dimensional space, a vertex is formed when two lines meet at an angle. In 3D space, a vertex is a point where three or more faces meet.A sphere is not an arced line but is one curved surface. It has no vertex.
A polyhedron (solid shape formed by plane faces) with four faces is called a tetrahedron.
EDGE
edge
An edge.
Edge
edge!
As long as they are not parallel, they will meet at an "edge", which is just a straight line.
If the faces are flat, it's a line.
vertice
the edge
edge
edge
A line segment formed where two faces meet is called an edge. In three-dimensional geometry, edges are the straight lines that connect the vertices of a solid shape, defining the boundaries of its faces. Each edge serves as a structural component, contributing to the overall shape and form of the object. For example, in a cube, each of the twelve edges connects two vertices and forms the intersection between two adjacent faces.