To find the scale factor that Leo used to enlarge the pentagon from its original size to the new size, we can use the formula for scale factor, which is the ratio of the size of the image to the size of the original object.
- The original side length of the pentagon is 3 cm.
- The enlarged side length of the pentagon is 8 cm.
We can calculate the scale factor (SF) as follows:
\[ SF = \frac{\text{Enlarged Length}}{\text{Original Length}} = \frac{8 \text{ cm}}{3 \text{ cm}} = \frac{8}{3} \]
Now, converting \( \frac{8}{3} \) into a mixed number:
\[ \frac{8}{3} = 2 \frac{2}{3} \]
Based on the options provided:
- a) \( 2 \frac{2}{3} \)
- b) 38
- c) \( 2 \frac{1}{3} \)
- d) 11
The correct answer is:
a) \( 2 \frac{2}{3} \).