Equal shares of identical wholes might be different shapes.
These squares are the same size.
Square A is divided into 4 equal parts.
So, the area of each part is of the area of square A.
Square B is divided into 4 equal parts.
So, the area of each part is of the area of square B.
Square A and square B are the same size, which means they have the same area.
So, the area of of square A is equal to the area of of square B.