Question

If d=120 degrees then find the angle of incidence​

Answer 1

Answer:

Let the other angle be x

= 120+x=180

= x=180-120

X= 60

Answer 2

Answer:

answer is 60..

Explanation:

angle of incidence is equal to angle of reflection..as well as sum of angles is 180 so

120+x=180

x=180-120

x=60