There can be no simply connected polyhedron since the numbers given in the question are not consistent with the Euler characteristic.
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A shape with four sides has more vertices because there are more points where edges (straight lines) meet than a 3-sided shape.
1 face 3 sides and 3 edges which are sides
A polygon is a shape with these characteristics: •At least 3 sides •No curved edges •No crossing edges •Closed edges; all edges MUST connect at a corner.
A triangle has 3 sides (or edges) and 3 corners (or angles)
An equilateral triangle has sides and angles. There are 3 sides in any triangle. Edges are in three dimensional figures.