How many pentominoes can you build with 5 in a row?

A pentomino is a geometric shape made up of five connected squares. There are 12 unique pentominoes that can be formed, which include various configurations like straight lines, L-shapes, T-shapes, and others. If you specifically consider pentominoes with 5 squares in a straight line, that would represent just one specific configuration, which is the straight line pentomino. Thus, while you can create many pentominoes, only one fits the criterion of being 5 in a row.