Question

triangle z is a scaled copy of triangle y.
2.3
9.5
triangle y
4.6
19
triangle z
what scale factor takes triangle y to triangle z?
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Explanation:

Step1: Recall scale factor formula

The scale factor from triangle Y to triangle Z is the ratio of corresponding side lengths of Z to Y.

Step2: Choose corresponding sides

Take the vertical sides: length in Z is 4.6, in Y is 2.3. Or horizontal sides: 19 in Z, 9.5 in Y.

Step3: Calculate scale factor

Using vertical sides: $\frac{4.6}{2.3} = 2$. Or horizontal sides: $\frac{19}{9.5} = 2$.

Answer:

2