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a/sinα=2R=6/sin40≈9,334
b/sin55=2R≈9,334
b=2R*sin55≈9,334*sin55≈7,646
g=180-α-β=85
c=2R*sing≈9,334*sin85≈9,3
R≈9,334/2
r≈4,67
b)
β=180-α-g=180-105-25=50
b/sinβ=2R
7/sin50≈9,14
2R≈9,14
a/sinα=2R
a=2R*sinα≈9,14*sin105≈8,829
c=2R*sing≈9,14*sin25≈3,862
R≈9,14/2≈4,57