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o A rhombus is sometimes called a diamond.
 Parallelogram :

o A parallelogram is a quadrilateral which has opposite sides
parallel and equal in length and
o opposite angles are equal (angles "A" are the same, and

angles "B" are the same).
 Trapezium:

o A trapezium is a quadrilateral which has a pair of opposite
sides parallel.
o Isosceles Trapezium:

o In an Isosceles trapezium two non-parallel sides are
of equal length and
o measure of two base angles are equal.