look at this diagram. if NP and QS are parallel lines and m

In the given figure,
[tex]NP\text{ }\parallel\parallel\text{ QS}[/tex]Therefore,
[tex]m\angle\text{SRO = m}\angle\text{NOR \_\_\_\_\_\_\_( Alternate Interior angles )}[/tex]Therefore,
[tex]m\angle\text{SRO = m}\angle\text{NOR }=\text{ 123}[/tex]Thus the required answer is,
[tex]m\angle\text{NOR }=\text{ 123}[/tex]