Question

Triángulos
Triángulos semejantes
62
40
20
38
Х
OK
X =
cm

Answer 1

$\frac{40}{38} = \frac{20}{x} \\ \frac{2}{38} = \frac{1}{x} \\ \frac{1}{19} = \frac{1}{x} \\ x = 19$