Each square has an area of one square centimetre, 1 cm². The area of the square is the side-length squared, 7². The side-length is multiplied by itself, 7 × 7. The area of the square is 49 cm².
The length of the rectangle is the base of the parallelogram. The width of the rectangle is the height of the parallelogram. The shapes have the same area. The area of the rectangle is found by ...