Isosceles 71154

Calculate all interior angles in the isosceles triangle ABC if we know that BC is the base, and we also know: | ∢BAC | = α; | CABCA | = 4α

Correct answer:

α =  20 °
β =  80 °
γ =  80 °

Step-by-step explanation:

β=γ=4α  α+β+γ=180    α+4 α+4 α=180  9α=180  α=9180=20  α=20=20
β=4 α=4 20=80
γ=4 α=4 20=80

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