Question

помогите плиииииз!!!​

Answer 1

Ответ:

C = 10π см

l = π/2 см

Объяснение:

C = 2πr

C = 2π5 = 10π см

l = a(rad)r

a(rad) = (π/180°)*a°

a(rad) = (π/180°)*18° = π/10

l = (π/10)*5 = π/2 см