Greatest angle

Calculate the greatest triangle angle with sides 124, 323, 302.

Correct answer:

γ =  88.2777 °

Step-by-step explanation:

Δ  124, 323, 302: Δ  124, 302, 323  a<b<c => α < β < γ a=124 b=302 c=323  c2 = a2+b2  2ab cos γ  γ1=arccos(2 a ba2+b2c2)=arccos(2 124 3021242+30223232)1.5407 rad  γ=γ1  °=γ1 π180   °=1.5407 π180   °=88.278  °=88.2777=88°1640"

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