Answer :

all angles in a triangle add up to 180º

1. 180-27-115 = 38º

2. 180-20-135 = 25º

3. 180-55-47 = 78º

4. 180-27-125 = 28º

5. 180-27-86 = 67º

6. 180-36-33 = 111º

7. 180-59-110 = 11º

angles on a straight line add to 180º or the exterior angle is equal to the sum of the opposite interior angle (i think that angle is 50 but if its not let me know)

8. 180-50 = 130º

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