Question

Os segmentos AB,CD,EF e GH formam nessa ordem uma proporçao sendo AB=15cm,CD=10 cm ,EF=12 cm calcule a medida de GH.

Answer 1

$\dfrac{AB}{CD}=\dfrac{EF}{GH}\Longrightarrow\dfrac{15}{10}=\dfrac{12}{GH}\\\\\\ 15\cdot GH=10\cdot12\\\\ 15\cdot GH=120\\\\ GH=\dfrac{120}{15}\\\\ GH=8\;\text{cm}$