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Al have 4 equal sides

All have perpendicular diagonals

All have 4 interior right angles that add up to 360 degrees

All have 4 exterior angles that add up to 360 degees

All will tessellate

All have a perimeter which is the sum of their 4 sides

All have an area which is product of any 2 sides

All belong to the class of polygons known as quadrilaterals

All have 2 pairs of opposite parallel lines

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11y ago

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