Respuesta :

Answer:

Let the unknown measure of angle be =x=x


Ratio of angles =3:8:9=3:8:9


3x+8x+9x=20x3x+8x+9x=20x


Angles in a triangle add to 180∘180∘.


20x=18020x=180


x=18020=9x=18020=9


Therefore measure of largest angle is;


9x=9∗9=819x=9∗9=81


Measure of the largest angle =81∘=81∘


Answer (C)...

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