I want to divide this figure into two rectangles and draw the center of each rectangle.

Then connect the two centers, and the midpoint of the connecting line is the center of gravity of the graph.

Then make a straight line perpendicular to the line with the center of gravity.

Divide this graph into two parts.

So these two pieces are the same area?

I don't know why the picture can't be uploaded. ...

Divide the figure into two rectangles and draw the diagonal lines of the two rectangles respectively.

The intersection of diagonal lines in each rectangle is the center and center of gravity of two rectangles.

Then connect these two centers of gravity and make the midpoint of this line, which is the center of gravity of the whole graph.

Then draw it according to the above steps, and it should be clearer. ...