Question

in figure calculate the area 9f parellogram ABCD.

Answer 1

apply the herons formula and multiply with 2 to get area of parallelogram

Answer 2

Here is ur ans..S=Semi perimeter
20/2=10
Ar. of triangle=√s(s-a)(s-b)(s-c)
=√10×2×5×3=√300=(√100×3)=(10√3)
Now,Ar. of this whole para..
10√3+10√3=20√3
So,this is ur ans..