To find the answer, use this equation:
65 + 45 + x = 180
Simplify:
110 + x = 180
Subtract:
x = 70
Your unknown interior is 70
Hope this helps!! :)
Area of shaded region = 2(4*4)=2*16=32 in squared
hope helped
I think 89 I don’t know why I am just guessing
