Answer
A square consists of 4 sides of the same length. The length of a side of a square can be denoted $s$. The area of a square can be defined as $s$$^{2}$. The perimeter of a square can be defined as 4$s$. Each corner of a square is a 90$^{\circ}$ angle.
A rectangle consists of two pairs of sides of the same length. These can be labeled $l$ and $w$. The perimeter of a rectangle can be defined as 2$l$ * 2$w$. The area of a rectangle can be defined as $l$*$w$. Each corner of a rectangle is a 90$^{\circ}$ angle.
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