We have the next figure
Because we have an irregular figure we divide the figure into a rectangle and in a triangle
For the area of the rectangle

l=length
w= width
In our case
l=19
w=16
we substitute the values

for the area of the triangle

b= base
h=height
in our case
b=16in
h=30-19=11in
we substitute the values

Then we sum the areas of the figures and we obtain the total are
