Calculate the area of ​​the triangle ABC if b = c = 17 cm, R = 19 cm (R is the circumradius).

Correct result:

S =  115.63 cm2


cosα2=c/2r α=2arccosc/2r=12651 β=γ=180α2=27  S=2r2sinαsinβsinγ=115.63 cm2

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