What about the Oklahoma Broadway Musical show makes it the shows it is now?

In “Oklahoma!” the musical found a new form. This “integrated musical” marked a revolution in American theater. ... The score was so popular that it became the first musical to have a complete original cast album by a major label, beginning the trend of recording original cast albums.

coordinates of r(b,c)

slope of nm is 0.

step-by-step explanation:

the midpoint of the line joining the points (x₁,y₁) and (x₂,y₂) is given by

the midpoint of the line segment nk is given by

∴r(b,c)

the slope of the line joining the points (x₁,y₁) and (x₂,y₂) is given by

slope of rs is

hence

coordinates of r(b,c)

and slope of nm is 0.