Question

6.
If an incident ray making an angle of 10° with the horizontal is to be reflec
perpendicular to the horizontal, by an inclined plane mirror, then inclination of
plane mirror (0) should be_____.
(1) 0=30°
(2) 0= 40°

(3) = 50°
(4) 0 = 60°
​

Answer 1

Answer:

if all four vertices of a quadrilateral lie on a circle .then such a quadrilateral is called cyclic quadrilateral