Ответ:
l=2π
R=6cм
a-?
l=πR²×a/180
a=180×l/πR²
a=180×2π/36π
α=10°
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Ответ:
l=2π
R=6cм
a-?
l=πR²×a/180
a=180×l/πR²
a=180×2π/36π
α=10°