Which detail is important and should be included in the summary of this passage?

Hey well the most important detail and no story was included!

Explanation:

Very Sorry! HAVE A GREAT DAY!

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.

this musical excerpt is an example of piano volume. (true) !