Determine 81572

In one triangle, one angle is 43°, and the second is 15° less than the third. Determine the unknown angles of the triangle.

Correct answer:

β =  76 °
γ =  61 °

Step-by-step explanation:

α=43   α+β+γ=180 β=15+γ 43+β+γ=180 β=15+γ  β+γ=137 βγ=15  Row2Row1Row2 β+γ=137 2γ=122  γ=2122=61 β=137γ=13761=76  β=76 γ=61



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