Question

triangle t is a scaled copy of triangle s. what scale factor takes triangle s to triangle t?

Explanation:

Step1: Select corresponding sides

We can use the pair of given sides 7 and 12.25.

Step2: Calculate scale - factor

The scale factor $k$ from triangle $S$ to triangle $T$ is found by dividing the length of the side in triangle $T$ by the length of the corresponding side in triangle $S$. So $k=\frac{12.25}{7}$.
$k = 1.75$

Answer:

1.75