Question

in fig. PQ is an incident ray on plane mirror AQB, and QR is the reflected ray .if angle PQR=124,then find the value of angle RQB

Answer 1

By the property of reflection, 

angle of incidence = angle of reflection 

Now.

let angle of incidence be x,

_____________________

As we know that the sum of all angles from a point is 180 

the,

180 = 100 + angle of reflection  + angle of incidence

180 = 100 + x+x

180-100 = x+x 

80 = 2x 

80/2 = x

40 = x 

Now,

angle of incidence = angle PQA = 40°

i hope this will help you

Answer 2

the answer of angle RQB is 28

may this help you