Answer:
78 square inches
Step-by-step explanation:
It is given that the length of the glass triangular prism for a telescope=5.5 inches, sides of the triangular prism = 4 inches and height =3 inches.
Thus, Surface area of the triangular prism =[tex]bh+(s_{1}+ s_{2}+s_{3})H[/tex] where H is the length of the triangular prism.
SA=[tex](4)(3)+(4+4+4)(5.5)[/tex]
=[tex]12+12(5.5)[/tex]
=78 square inches.
