I do know how to find the area of a square and rectangle, but how do you fing the area of a rhombus. (that is at least what it looks like.)

The shape I'm talking about is like a rectangle but it looks like one side got stretched to the left. (sorry if I made that even more confusing.)
Please help! Thank you!

area rhombus: base x height

If it is a parallel quadralaterial (base/top parallel, sides unequal), then area= (1/2(base+top)height)