The designed area is the common region between two sectors BAEC and DAFC.

Area of sector BAEC = 90^{o}/360^{o} x 22/7 x (8)^{2}

= 1/4 x 22/7 x 64

= 22/7 x 16

= 352/7 cm^{2}

Area of Δ BAC = 1/2 x BA x BC

= 1/2 x 8 x 8 =32 cm^{2}

Area of the designed portion = 2 × (Area of segment AEC)

= 2 × (Area of sector BAEC − Area of ΔBAC)