In a sequence of numbers arranged from smallest to largest:
a. The middle number, when such a sequence has an odd number of values. For example, in the sequence 3, 4, 14, 35, 280, the median is 14.
b. The average of the two middle numbers, when such a sequence has an even number of values. For example, in the sequence 4, 8, 10, 56, the median is 9 (the average of 8 and 10). Compare arithmetic mean, average, mode.
A line joining a vertex of a triangle to the midpoint of the opposite side.