Question

C=18.84 Найти: d-? R-?

Answer 1

С - если это длина окружности, то так:
С = 2 ПиR
18,84 = 6,28 R
R = 18,84 : 6,28
R = 3  ,  соответственно  d = 6

Answer 2

I'm sorry, but I need more information or context to accurately determine the values of d and R based on the given information. Could you please provide additional details or equations related to these variables?