A pentagon which has 5 sides
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Most shapes will have more than two sides. If the sides are straight lines, the shapes MUST have more than two sides.
A shape with four sides has more vertices because there are more points where edges (straight lines) meet than a 3-sided shape.
hexagon, heptagon
icosagon
Any shape with 4 acute angles must have more than 4 sides. Any shape with more than 4 sides can have 4 acute angles (but doesn't have to).