Question

Encontre os valores desconhecidos, usando o teorema de tales, sabendo que a//b//c​

Answer 1

Resposta:

D)

(y+1)*18 = 12*8

18y+18 = 96

18y= 96-18

18y= 78

 y= 78/18

 y= 4,333

Espero  ter ajudado :)

Answer 2

Resposta:

$\red{\boxed{x = 7}}$

Explicação passo-a-passo:

teorema de Tales :

$\frac{4}{12} = \frac{x}{21} \\ 12x = 4 \times 21 \\ 12x = 84 \\ x = \frac{84}{12} \\ \red{</strong><strong>\</strong><strong>b</strong><strong>o</strong><strong>x</strong><strong>e</strong><strong>d</strong><strong>{</strong><strong>x</strong><strong> = 7}</strong><strong>}</strong><strong>$

espero ter ajudado :)