For the left-hand triangle we know:

.
Solving for

we have:



So the angles on the left are: 47,31 and 102 degrees.
On the right we have

Substituting known values and solving we get:

[tex]y=72\°[/tex}
So the angles on the right are, 72, 61 and 47 degrees.
Set the equation so that it is x=-3/5y + 1/2
then you get it back into y=mx+b form
3/5y= -x + 1/2
multiply this by 5/3 to get the y equal to 1
y= -5/3x+ 5/6
Total area = 2*8.5*6 + 2*8.5*5.5 + 2*6*5.5 = 261,5 in^2 answer