Question

Dividir o segmento ab de medida 20 cm em dois segmentos cujs razao vale 1/4

Answer 1

$\frac{x}{y} = \frac{1}{4}\\\\ \frac{x+y}{y}= \frac{1+4}{4}\\\\\frac{20}{y}= \frac{5}{4}\\\\5y=80\\y= \frac{80}{5}\\\\y=16\\\\\\\frac{x}{16} = \frac{1}{4}\\\\4x=16\\\\x=4$