A Rhombus or a paralellogram or what is known as a "diamond-shape", like on a playing card. These would fit the criteria given - They are all names for a quadrilateral with four equal sides with non-equal angles.
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Rhombus = 4 equal sides Rectangle = 4 equal angles Square = 4 equal sides and 4 equal angles Rhomboid = unequal adjacent sides and angles
A square has 4 equal sides with 4 right angles.
It is a square that has 4 equal sides and 4 right angles.
This is a rectangle. Each of its vertex angles measures 90°. It does not have 4 equal sides but opposite sides are equal.
It is: (n-2)*180 whereas 'n' is the number of sides of any particular polygon which will give the total sum of angles in the polygon. So a quadrilateral has 4 sides and (4-2)*180 = a total sum of 360 degrees