question_answer

The smallest angle of a triangle is one-fifth the sum of the other two and the largest angle exceeds the sum of the other two by\[\text{2}0{}^\circ \]. Find the largest angle of the triangle.

A)  \[\text{1}00{}^\circ \]                                  

B)  \[\text{9}0{}^\circ \]

C)  \[\text{12}0{}^\circ \]                  

D)         \[\text{11}0{}^\circ \]