Answer:
24
Step-by-step explanation:
To find the missing side, write a proportion using side lengths from each similar shape. A proportion is an equation that sets equal two ratios.
[tex]\frac{40}{48}=\frac{20}{y}[/tex]
Find y by cross multiplying numerator and denominator of each fraction.
40y = 48(20)
40y = 960
y = 24
