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Ответ

Ответ дан
lidiasaraa3

∠В=180-(20+10)=150°

АС/sin B=2R-т.синусов

25/sin150=2R

2R=25/(1/2)=50

R=25

Ответ

Ответ дан
takushnir

∠В=180°-(20°+10°)=150°

АС/sin ∠B=2R- по следствию из теоремы синусов

25/sin150°=2R

25/sin30°=2R

2R=25/(1/2)=50

R=25

Ответ радиус равен 25

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