Question

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

Explanation:

Step1: Find the scale - factor

Since the two rectangles are similar, the ratio of their corresponding sides is the same. The ratio of the known corresponding sides is $\frac{4}{8}=\frac{1}{2}$.

Step2: Calculate the missing length

Let the missing length be $x$. We know that $\frac{x}{18}=\frac{1}{2}$. Cross - multiplying gives $x=\frac{18}{2}$.

Answer:

9