Answer:
3
Explanation:
Side lengths of ABC: 4, 1
Side lengths of A'B'C': 12,3
4×3 = 12
1×3 = 3
3 is the scale factor of triangle ABC to triangle A'B'C'
1/3
a scale factor is basically comparing the lengths/width of a figure. the top of the figures are 1 (smaller figure) and 3 (bigger figure). then compare that and you get 1/3.
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