Rashaan draws these two trapezoids with the dimensions labeled in centimeters. What scale factor does he use to create the trapezoid on the right from the one on the left?

To determine the scale factor from one trapezoid to the other, you will need to compare corresponding dimensions of the two trapezoids (such as the lengths of the bases or the height).

Here's how you can calculate the scale factor:

1. **Choose a pair of corresponding dimensions**: For instance, if you know the lengths of the bases of the left trapezoid are 'a' cm and 'b' cm, and the lengths of the bases of the right trapezoid are 'c' cm and 'd' cm, you can create a ratio.

2. **Calculate the scale factor**:
- For example, if you choose the longer base, the scale factor would be \( \frac{c}{a} \) (where c is the length of the longer base in the right trapezoid and a is the length of the longer base in the left trapezoid).
- You can use the shorter base as well and find the scale factor \( \frac{d}{b} \).

3. **Check if the scale factor is consistent**: Both of the ratios should yield the same scale factor if the trapezoids are similar.

If you provide the specific dimensions of both trapezoids, I can help you calculate the exact scale factor!