The area of glass in region BCIH would be= 37.12ft².
How to calculate the area of the glass from the given window?
To calculate the area of the glass from the given window, the following steps should be taken as follows:
Area of sector BGC - Area of sector HGI = Area BCIH.
Area of sector BGC;
= ∅/360× πr²
= 45/360 × 3.14× 36
= 99/2(semi circle)
= 49.5ft².
Area of sector HGI;
= 45/360×3.14× 9
= 24.75/2 = 12.38ft²
Area of BCIH
= 49.5-12.38 = 37.12ft².