Question

what is the missing length in the scaled copy? units 90×?=30 scale factor length in original · scale factor = length in scaled copy

Explanation:

Step1: Find the scale factor

We know that \(90\times\text{scale factor}=30\). So, the scale factor \(=\frac{30}{90}=\frac{1}{3}\)

Step2: Calculate the missing length

The original length is \(45\). Using the formula \(\text{length in original}\times\text{scale factor}=\text{length in scaled copy}\). Substitute the values: \(45\times\frac{1}{3}\)

$$45\times\frac{1}{3}=\frac{45}{3}=15$$

Answer:

\(15\)