Here, you can see the Area Formulas for Different Shapes in Tabular Format.
Shape Formula Rectangle A = l × w
where A is the area, l is the length, and w is the width. Square A = s2
where A is the area, s is the length of a side. Triangle A = b × h
where A is the area, b is the base, and h is the height. Circle A = πr2
where A is the area, r is the radius.