Is every rectangle a parallelogram?is every parallelogram a rectangle ? [with reason]

every rectangle is parallelogram but not every parallelogram is rectangle.

because rectangle have the properties of a parallelogram as it have four sides, opposite sides are parallel to each other......but every parallelogram is not rectangle as in rectangle each sides are at an angle of 90° with each other..which is not in all the parallelograms .

hope it helps..