Question

this triangle is a scaled copy. it was scaled by a scale factor of 5. suppose you want to scale it back to its original size. what scale factor should you use?

Explanation:

Step1: Recall scale - factor concept

To reverse a scale - up operation, we use the reciprocal of the original scale factor.

Step2: Calculate the reverse scale factor

The original scale factor is 5. The reciprocal of 5 is $\frac{1}{5}$.

Answer:

$\frac{1}{5}$