To find the scale factor Randee used to create the copy on the right (the second triangle) from the original on the left (the first triangle), we can compare the lengths of corresponding sides.
The lengths of the triangles are:
- First triangle (original): 10 cm, 15 cm, 18 cm
- Second triangle (copy): 36 cm, 30 cm, 20 cm
Next, we can find the scale factor using the formula:
\[
\text{Scale Factor} = \frac{L_{copy}}{L_{original}}
\]
We can calculate the scale factor for each pair of corresponding sides:
-
For the sides 10 cm (original) and 36 cm (copy):
\[
\text{Scale Factor} = \frac{36}{10} = 3.6
\]
-
For the sides 15 cm (original) and 30 cm (copy):
\[
\text{Scale Factor} = \frac{30}{15} = 2
\]
-
For the sides 18 cm (original) and 20 cm (copy):
\[
\text{Scale Factor} = \frac{20}{18} = \frac{10}{9} \approx 1.11
\]
Since the scale factor should be consistent across corresponding sides of similar triangles, this indicates that the triangles are not proportionally similar across all sides.
The scale factor from the original triangle to the second triangle varies between the sides. However, if the goal is to identify one common scale factor, we can take the most applicable scale from the provided options, which is 2 (based on the second pair of sides).
Thus, the scale factor Randee used to create the copy on the right is 2.