A pentagon has 5 sides. Look at a photo of the pentagon building in Washington D.C. and you will see that all 5 sides are equal.
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A pentagon
The shape is a regular pentagon.
There is no such shape. A 2d shape with 5 sides and all equal angles must be a regular pentagon (or a 5-pointed star if you stretch the definition of "all angles"). And a regular pentagon - or star - has 5 lines of symmetry.
A regular pentagon has five sides of equal lengths.
a regular pentagon