i) Area of a figure ABCDEF = Area of square ABCF + area of trapezium CDEF
= AB × BC + 1/2 × CG × (ED + CF)
= 18 × 18 + 1/2 × 8 × (7+ 18)
[∵h = CG = 8 cm, FC = AB = 18 cm]
= 324 + 4 × 25
= 324 + 100
= 424 cm2
ii) Area of a figure ABCDEF = Area of rectangle ABCD + area of trapezium ADEF
= AB × BC + 1/2 × GA × (EF + AD)
= 20 × 15 + 1/2 × 8 × (6 + 15)
[∵ GA = GB-AB = 28-20 = 8cm; AD = BC – 15 cm]
= 300 + 4 × 21
= 300 + 84
= 384 sq.cm
