it if called a edge for a 3D shape
A shape in 3D is a polygon. Poly=many and gon=shape.
A 12 sided 3D shape is called a dodecahedron.
A five sided 3d shape is called a pentehedron
A vertex (plural: vertices or vertexes) is the point of intersection of lines (like the 'corners' of a 3D shape). A corner is the same but where only two lines are intersecting.
An 11-sided 3D shape is a hendecahedron.
It is important to learn and remember the name of 3D shapes. A 19 faced 3d shape is called a nonadecahedron.
An oval 3D shape is called an ellipsoid. It is a three-dimensional shape that is similar to a stretched out sphere.
Trapezoid is 3D. The shadow of this shape is called Trapezium.
A 3D shape that has 6 edges is called a hexagonal prism.
a 4 sided 3d shape is called a triangular prism!!!!!!!!!!!!!!!
the name of a 20 sided 3d shape is called a icosahedron