Question

Em cada figura determine x e y, sabendo que r, s e u são paralelas.​

Answer 1

Letra a)

$\frac{10}{12} = \frac{5}{y} \\ 10 \times y = 5 \times 12 \\ 10y = 60 \\ y = \frac{60}{10} \\ y = 6$

Letra b)

$\frac{10}{3} = \frac{y}{6} \\ 3 \times y = 6 \times 10 \\ 3y = 60 \\ y = \frac{60}{3} \\ y = 20$

$\frac{3}{x} = \frac{6}{4} \\ 6 \times x = 3 \times 4 \\ 6x = 12 \\ x = \frac{12}{6} \\ x = 2$

$\frac{4}{10} = \frac{2}{x} \\ 4 \times x = 2 \times 10 \\ 4x = 20 \\ x = \frac{20}{4} \\ x = 5$