In order to find the area of the white border, first calculate the area of the greater rectangle and the area of smaller rectangle:
A1 = (15 cm)(9 cm) = 135 cm² greater rectangle
A2 = (8 cm)(2 cm) = 16 cm² smaller rectangle
next, subtract A2 to A1:
area of the white border = A2 - A1 = 135 cm² - 16cm² = 119 cm²
Hence, the area of the white border is 119 cm²
