Answer:
60, 45, 75.
Explanation:
A triangle must be; when you add up all its angles the number is 180.
Ex: Angle 1+Angle 2+Angle 3 = 180
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First, let's try 60,40,70.
60+40+70 = 170, which isn't 180.
Next...
60+45+75 = 180, so that is the answer.
If you still want to try the third one...
60+45+80 = 185