AB = 80 m, BC = 60 m DF = 50 m, GE = 50 m HE = 100m

Area of region ACDF is:

3750 m2 3500 m2 3250 m2 3000 m2

3750 m2

area of ΔACE = = \(\frac{1}{2}\) × AC × EH = \(\frac{1}{2}\) × 100 × 100 = 5000 m2 area of ΔEFD = \(\frac{1}{2}\) × DF × EG = \(\frac{1}{2}\) × 50× 50 = 1250 m2 Area of region ACDF = area of ΔACE - area of ΔEFD                               = 5000 - 1250 = 3750 m2