<Tr> <Th> Dual polygon </Th> <Td> rhombus </Td> </Tr> <Tr> <Th> Properties </Th> <Td> convex, isogonal, cyclic Opposite angles and sides are congruent </Td> </Tr> <P> In Euclidean plane geometry, a rectangle is a quadrilateral with four right angles . It can also be defined as an equiangular quadrilateral, since equiangular means that all of its angles are equal (360 ° / 4 = 90 °). It can also be defined as a parallelogram containing a right angle . A rectangle with four sides of equal length is a square . The term oblong is occasionally used to refer to a non-square rectangle . A rectangle with vertices ABCD would be denoted as ABCD . </P> <P> The word rectangle comes from the Latin rectangulus, which is a combination of rectus (as an adjective, right, proper) and angulus (angle). </P>

How many vertices sides does a rectangle have