Area 1:
Separate this figure into two shapes: 1.) rectangle of width 50 and hieght 300
and 2.) triangle of base 300 and hieght 300tan(20).
Area 2:
Find the area of the drawn triangle, it has a hieght of 220 and a base of 220tan(20). Then the area of figure 2 is totalarea - area1 - areatriangle.