Practice determining the measures of line segments and angles. What is the midpoint of ? A number line going from negative 10 to positive 10. A closed circle appears at negative 4 and is labeled L. A closed circle appears at negative 1 and is labeled M. A closed circle appears at positive 2 and is labeled N. A closed circle appears at positive 3 and is labeled P. A closed circle appears at positive 8 and is labeled Q. point M point N point P point Q