A quadrilateral.
Could be a rhombus, trapezium, kite, parallelogram with no right angles.
Never a square or rectangle.
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rhombus
it is a parallelogram or a trapezoid
A pyramid has 4 straIGHT SIDES
It is not clear what you mean by "has 4 right sides opposite sides equal". If you delete the phrase "4 right sides", the answer is a rhombus.
trapezium