Answer:
RS = 2.8
Step-by-step explanation:
Given that the figures are similar then the ratios of corresponding sides are equal, that is
[tex]\frac{RS}{CD}[/tex] = [tex]\frac{PQ}{AB}[/tex] , substitute values
[tex]\frac{RS}{4}[/tex] = [tex]\frac{2.1}{3}[/tex] ( cross- multiply )
3RS = 8.4 ( divide both sides by 3 )
RS = 2.8
