Not sure about a five sided shap, but a five sided plane shape is called a pentagon.
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A five sided 2 dimensional object is called a pentagon.
A kite and a trapezoid are both 4 sided quadrilaterals
A Tetracontakaitetragon is a forty - five sided shape ...
A 5 sided polygon is a pentagon
A pentagon or an irregular pentagon if the sides are unequal in length.