\"\"

\

The endpoints are \"\" and \"\"

\

The midpoint of a segment with endpoints \"\" is \"\"

\

\"\"      (Substitute  \"\")

\

\"\"                   (Add: \"\")

\

\"\"                            (Divide: \"\")

\

The midpoint is \"\".

\

\"\"

\

The midpoint of the segment with endpoints \"\" and \"\" is \"\".