Each shade of paper is divided into 3 triangles i.e., I, II, III 8 cm For triangle I: ABCD is a square [Given] ∵ Diagonals of a square are equal and bisect each other. ∴ AC = BD = 32 cm Height of AABD = OA = (12 x 32 )cm = 16 cm Area of triangle I = (12 x 32 x 16 ) cm2 = 256cm2 For triangle II: Since, diagonal of a square divides it into two congruent triangles. So, area of triangle II = area of triangle I ∴ Area of triangle II = 256 cm2 For triangle III: The sides are given as a = 8 cm, b = 6 cm and c = 6 cm Thus, the area of different shades are: Area of shade I = 256 cm2 Area of shade II = 256 cm2 and area of shade III = 17.92 cm2