What is the perimeter of a polygon with vertices at (−2, 1) , ​ (−2, 4) ​, (2, 7) , ​ (6, 4) ​, and (6, 1) ​?

A quick sketch of the point in a coordinate grid reveals a  3x8 rectangle with a perimeter of 22.  The distance between (-2,1) and (-2,4) is 3 and the distance between (-2, 1) and (6,1) is 8