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Answer:
88°
Step-by-step explanation:
If the ratio of the third angle to the sum of the other two is 1 : 2, then the third angle must be 1/(1+2) = 1/3 of the total of angle measures. The third angle is 1/3(180°) = 60°.
If the second angle is 28° less than 60°, then the first angle is ...
180° -60° -(60-28)° = (60 +28) = 88° . . . . . sum of all angles is 180°
The largest angle is 88°.
