Standard practice
When one coordinate matches, distance is the absolute difference of the other.
The points (2, 5) and (2, -3) share an x-coordinate.
When one coordinate matches, the distance is the absolute difference of the other coordinate. Grade 6 distance on the plane here is horizontal or vertical, not the full distance formula.
Problem 1 of 9. Activate, study a model, try guided items, work independently, apply, and reflect.