Question

CALCULE EM GRAUS, AS MEDIDAS DOS ARCOS EM RADIANOS 120º? alguém sabe? por favor ;)

Answer 1

Temos que:

$180^{\circ}=\pi~\text{rad}$

$120^{\circ}=x$

$180x=120\pi \iff x=\dfrac{120\pi}{180} \iff x=\dfrac{2\pi}{3}$

Logo, $120^{\circ}=\dfrac{2\pi}{3}~\text{rad}$

Answer 2

Regra de 3 simples:.


180 ---- π
120 ---- x

3 ---- π
2 ---- x

3x = 2π

x = 2π/3