Question

what single transformation was applied to triangle a to get triangle b?

Explanation:

Step1: Observe position change

Notice that triangle B is directly above triangle A.

Step2: Identify transformation type

Since only the vertical position changes, it is a translation. Count the number of units moved vertically. By counting the grid - squares, triangle A is moved 4 units up to get triangle B.

Answer:

Translation 4 units up