Find the length of a horizontal or vertical segment from coordinates

Find the coordinate that changes between the two points. The length is the number of units between those two values.

1. Point M is at (2, 1) and point N is at (2, 5). How long is segment MN?
2. Point E is at (0, 0) and point F is at (4, 0). How long is segment EF?
3. Segment RS has endpoints R(5, 1) and S(5, 2). Find its length in units.
4. A line segment joins (3, 5) and (3, 2) on a coordinate grid. How many units long is it?
5. Segment RS has endpoints R(2, 4) and S(4, 4). Find its length in units.
6. A line segment joins (9, 6) and (0, 6) on a coordinate grid. How many units long is it?
7. A line segment joins (8, 10) and (1, 10) on a coordinate grid. How many units long is it?
8. A line segment joins (1, 9) and (1, 2) on a coordinate grid. How many units long is it?
9. Segment PQ has endpoints P(−1, −3) and Q(−1, −7). Find its length in units.
10. Point C is at (−7, −6) and point D is at (8, −6). How long is segment CD?
11. Segment RS has endpoints R(−10, 1) and S(−10, −4). Find its length in units.
12. Point P is at (−3, 8) and point Q is at (−3, 4). How long is segment PQ?
13. A line segment joins (1, 5.5) and (1, −1) on a coordinate grid. How many units long is it?
14. Point A is at (−7, −7) and point B is at (7, −7). How long is segment AB?
15. Point C is at (−9, −5) and point D is at (−9, −10). How long is segment CD?
16. A line segment joins (0.5, −3.5) and (0.5, 5) on a coordinate grid. How many units long is it?
17. Segment RS has endpoints R(15.5, 14) and S(15.5, −4.5). Find its length in units.
18. Segment MN has endpoints M(−4.5, 2) and N(18.5, 2). Find its length in units.
19. A line segment joins (−20, −8) and (−20, 3) on a coordinate grid. How many units long is it?
20. Segment MN has endpoints M(−0.5, 6.5) and N(−0.5, 19). Find its length in units.