Question

Atividade: Resolva a​

Answer 1

Resposta:

Explicação passo a passo:

$\frac{a}{b} =\frac{c}{d}$

$extremos=>(a)\:e\;(d)$

$meios=>(b)\:e\;(c)$

$\frac{21}{30} =\frac{14}{20}$

$a)$

$\frac{20}{30} =\frac{14}{21}$

$b)$

$\frac{14}{20} =\frac{21}{30}$

$c)$

$\frac{30}{21} =\frac{20}{14}$

$d)$

$\frac{21}{14} =\frac{30}{20}$