Question

Умоляю помогите! Завтра контрольная (итоговая) ​

Answer 1

$1. \C = 2pi R = 2*pi*3 = 6pi \Answer: 6pi cm\2.\frac{3.5}{x} = frac{9}{2} => x = frac{3.5*2}{9} = frac{7}{9} \Answer: frac{7}{9} \3.\S = pi r^2 = frac{pi d^2}{4} = frac{14^2*pi}{4} = 49pi cm^2\ Answer: 49pi cm^2\4. \C = 2pi R = pi d = 15pi cm\Answer: 15pi cm\5.\D = 2R => R = frac{D}{2} = frac{26.4}{2} = 13.2 cm\Answer: 13.2 cm$