The points A, F and E are aligned.
Complete the following proof :
As the triangle AFI is right angled and
at , each of its acute angles measures .
Thus the angle AF measures 45°.
In the triangle HIF, the sum of the angles equals .
Thus angle IFH = - (113 + ) =
As the triangle HFG is , the angle HFG measures .
As the points A, F and E are aligned, the angle AFE measures .
Thus angle GFE = 180 - (45 + + 60) = .
The orange angle measures 40°.