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Răspuns:
Aplici teorema sinusului
a/sin<A=b/sim<B
6√2/sin 30=b/sin 45
6√2/(1/2)=b/(√2/2)
12√2=b/(√2/2)
b=12√2*√2/2=12*2/2=12
AC=12
Explicație pas cu pas: