Question

determine,em graus,a medida do ângulo 2π/3 rad.

Answer 1

2π/3 --------- x

2π ---------- 360°

2πx=(360°).2π/3

2πx=720°π/3

2πx=240°π

x=240°π/2π

x=120°

Answer 2

$\pi$=180 graus
2$\pi$=360 graus

$\frac{2 \pi }{3}= \frac{360}{3} =120$