znanija.com/task/35071164
L(дуги) = α*R ( α - центральный угол в радианах )
α = 60 ° = π /3 рад
L(дуги) = (π /3)*R =(π /3)*12 см = 4π.
* (60° /360°) =1/6 часть длины окружности: L(дуги) =(1/6)*2πR =πR/3 *
----------------------
C =2πR =π*2R =π*b/sin∠B= π*b/sin(180°-(30°+30°) =
π*b/sin(180°- 60°) =π*b/sin60°= π*10/(√3 /2 ) =(20/√3)π =
(20√3 / 3)π.
Copyright © 2024 SCHOLAR.TIPS - All rights reserved.
Answers & Comments
Verified answer
znanija.com/task/35071164
L(дуги) = α*R ( α - центральный угол в радианах )
α = 60 ° = π /3 рад
L(дуги) = (π /3)*R =(π /3)*12 см = 4π.
* (60° /360°) =1/6 часть длины окружности: L(дуги) =(1/6)*2πR =πR/3 *
----------------------
C =2πR =π*2R =π*b/sin∠B= π*b/sin(180°-(30°+30°) =
π*b/sin(180°- 60°) =π*b/sin60°= π*10/(√3 /2 ) =(20/√3)π =
(20√3 / 3)π.