Question

what is the missing length in the scaled copy? scaled copy 30? original 90 45 units

Explanation:

Step1: Set up proportion

Since the original and scaled - copy are similar, the ratios of corresponding sides are equal. Let the missing length be $x$. The proportion is $\frac{30}{90}=\frac{x}{45}$.

Step2: Cross - multiply

Cross - multiplying gives $90x = 30\times45$.

Step3: Solve for $x$

First, calculate $30\times45 = 1350$. Then $x=\frac{1350}{90}=15$.

Answer:

15