A rectangle means that all four corners are right angles, the opposite sides are parallel, the opposite sides are equal to the four corners, and the diagonal lines are equally divided.

A rhombus means that the opposite sides are parallel, the four sides are equal, the diagonals are equal, and the diagonals are equally divided and perpendicular to each other.

A square means that the opposite sides are parallel and the four sides are equal, the four corners are equal and at right angles, and the diagonal lines are vertically bisected and equal.

Remember, the properties of parallelogram define rectangles, diamonds and squares.

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