Question

in figure,AB is a mirror,PQ is the incident Ray and AT the reflected Ray. If PQR =100°,find PQA

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


-by ABHAY

Answer 2

Answer:

40°

Step-by-step explanation:

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°