Question

Геометрия SOS
Срочно

Answer 1

1

Найдём АС

АС = корень (13^2 - 12^2) = 5

Найдём sin(B), ctg(A)

sin(B) = 5/13 = 0.384

ctg(A) = 12/13 = 0.923  

2

cos(B) = 37 градусов

угол A = 180 - (90 + 37) = 53 градусов

AB/sin(C) = BC/sin(A)

BC = AB*sin(A)/sin(C)

BC = 25*sin(53)/90 = 19.965