Answer :
Let the sides of triangle be 100m, 160m, and 100m
Semi perimeter,
Now, using Heron’s formula,
= 4800 m2
Now, we know that, diagonal divides a parallelogram into two triangles of equal areas.
Area of parallelogram ABCD = 2(area of ΔABC)
= 2 × 4800
= 9600 m2
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