Final answer:
The coordinates of equilateral triangle ABC with base AB = 2a along the x-axis and height 3a are A: (0, 0), B: (2a, 0), C: (a, 3a).
Step-by-step explanation:
An equilateral triangle ABC withbase AB = 2a along the x-axis and height 3a has the following coordinates:
A: (0, 0)
B: (2a, 0)
C: (a, 3a)