How to find an area irregular quadrilateral

Hi,

Could anybody give a solution in finding the area of an irregular quadrilateral.

 

divide irregular quadrilateral into rectangle and right triangle, find areas and add them up

rectangle have the length of 857 and the width of 43
so the area of the rectangle=857*43=36851

one leg of the right triangle (altitude) are 865-43=822 and the other leg is 857
the area of the right triangle= (1/2)822 *857=352227

the area of the irregular quadrilateral=36851+352227=389078

 

Interesting. Nice reply.

 

That's assuming that the sides labeled "255" and "43" are parallel.