You can put this solution on YOUR website! Parallelogram, points in capital letters F O U R (which looks like the word for 4). Given angle RFO is 74 degrees, FO = 5, OU = 1.
Knowing this to be parallelogram, angle OUR is also 74 degrees.
FO=UR=5 and OU=RF=1.
You can treat either FO or UR as a base. The height of the figure is OU*sin(74).