Q11 of 50 Page 12

The adjacent sides of a parallelogram ABCD measure 34 cm and 20 cm, and the diagonal AC measures 42 cm. Find the area of the parallelogram.


Now in ∆ABC


AB = a = 34 cm, BC = b = 20 cm, AC = c = 42 cm


Let a, b and c are the sides of triangle and s is


the semi-perimeter, then its area is given by:


A = where


= = 48


A=


A = = cm2


Hence, area of Parallelograme ABCD =2× 336 =672 cm2


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