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A pentagon. If the sides and angles are equal it is a REGULAR pentagon.
A 1000-sided shape is called a chiliagon. It is a polygon with 1000 sides and 1000 angles. The sum of the interior angles of a chiliagon is 179,640 degrees. It is a regular polygon, meaning all its sides are of equal length and all its angles are equal.
a square. all of the angles are 90 degrees or pi/2 radians.
A seven sided shape is a heptagon.
A four sided figure with four equal sides and no right angles is a diamond, or a rhombus. If it had four right angles, it would be a square.