Look at the lines below and answer the lengths.

1) AB = inches

2) CD = inches

3) AB+ CD = inches

1) Starting point of line AB: 3, Ending point of line AB: 6. Length of AB: 6-3 = 3 inches

2) Starting point of line CD: 8, Ending point of line CD: 9. Length of CD: 9-8 = 1 inch

3) AB + CD = 3 + 1 = 4 inches