Question

Calcule o teorema de tales:​

Answer 1

a)

$\frac{x}{6} = \frac{20}{4} \\ x \times 4 = 20 \times 6 \\ 4x = 120 \\ x = \frac{120}{4} \\ x = 30$

b)

$\frac{4}{2} = \frac{x}{2} \\ 2 \times x = 4 \times 2 \\ 2x = 8 \\ x = \frac{8}{2} \\ x = 4$

c)

$\frac{5}{7} = \frac{30}{x} \\ 5 \times x = 7 \times 30 \\ 5x = 210 \\ x = \frac{210}{5} \\ x = 42$

d)

$\frac{9}{x} = \frac{2}{18} \\ 2 \times x = 9 \times 18 \\ 2x = 162 \\ x = \frac{162}{2} \\ x = 81$