Question

what is the missing length in the scaled copy?
units
25 × ? = 50
scale factor
length in original · scale factor = length in scaled copy
original rectangle: top side 25, right side 40
scaled copy rectangle: top side 50, right side ?

Explanation:

Step1: Find scale factor

Solve \( 25\times? = 50 \). Divide both sides by 25: \(?=\frac{50}{25}=2 \).

Step2: Calculate scaled length

Use formula: length in original \(\times\) scale factor = length in scaled copy. Original height is 40, scale factor is 2. So \( 40\times2 = 80 \).

Answer:

80