Question

what is the missing length in the scaled copy? units 18 8 original? 4 scaled copy

Explanation:

Step1: Find the scale - factor

The ratio of the corresponding sides of the original and the scaled - copy gives the scale - factor. The known corresponding sides are 8 (original) and 4 (scaled - copy). The scale - factor $k=\frac{4}{8}=\frac{1}{2}$.

Step2: Calculate the missing length

Let the missing length in the scaled - copy be $x$. The corresponding side in the original is 18. Using the scale - factor, we have $x = 18\times k$. Substituting $k=\frac{1}{2}$, we get $x=18\times\frac{1}{2}=9$.

Answer:

9