A heptagon.
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A shape with four unequal sides is called an irregular quadrilateral.
They are perpendicular lines that meet at right angles which is 90 degrees.
This is a parallelogram called a rectangle. A square has four right angles and four sides that are equal in length.
four, one for each corner. If a corner is not a right angle, the shape is then called a rhombus.
A shape with 7 sides and 7 angles is called a heptagon. A heptagon is a polygon with seven straight sides and seven interior angles. Each interior angle of a regular heptagon measures 128.57 degrees.