ABCD is a trapezium, side AB || side DC,
l(AB) = 13 cm, l(DC) = 9 cm, l(AD) = 8 cm,
Area of a trapezium = x sum of lengths of parallel sides x height
∴ A (ABCD) = x [l(AB) + l(DC)] x l(AD)
= (1/2) x (13 + 9) x 8
= (1/2) x 22 x 8
= 11 x 8
= 88 sq.cm
∴ The area of ABCD is 88 sq. cm
