Four.
And a rectangle can only be 2d.
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not possible cause rectangle is a 2D not a 3D figure. it has 4 sides and four right angles at its vertices.
2d rectangle has 4 sides.
4 edges A rectangle has four edges. A rectangle has 4 sides but no edges which are normally applicable to polyhedrons.
A triangle has three edges; a rectangle has four.
2d shapes do not have edges or vertices