If you had a 3D shape made out of paper, that was all folded and taped together, and you pulled the tape off and layed the figure out flat, then you would get the net of the three dimensional solid.
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One main characteristic of non-Euclidean geometry is hyperbolic geometry. The other is elliptic geometry. Non-Euclidean geometry is still closely related to Euclidean geometry.
There are two main uses. One, from graph theory, is essentially the same as a network. A net consists of a number of nodes (points), some of which are connected by lines. The second use comes from basic solid geometry. A net of a three-dimensional obect is a two dimensional shape that can be folded into the 3-d shape.
molecular geometry is bent, electron geometry is tetrahedral
Molecular geometry will be bent, electron geometry will be trigonal planar
It has seesaw geometry.