Translations move a shape without turning or stretching it. The best way to tackle transformations in general and translations in particular. Try to ignore the shape while you work, and just move each point separately.
translation A->B is marked as a vector [ 5] using the "[ ]" notation
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Move the vectors,
Can you predict what happens when the blue arrow meets the start of the red arrow
Can you predict what happens if you move the points separately
Can you predict what happens if you move the vectors separately
Can you predict what happens if you move the shapes B, C or D separately
Can you predict what happens if you move (or change the shape) the top shape separately
Can you work out the vector that takes B to D