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5. Let the angles be 3x and 4x.
3x + 4x = 180°
or, x = 180/7= 25.7.
3x = 77.1
4x = 102.8.
6. a. x + 3x + x = 180
x = 180/5 = 36°
3x =108°
b. 45,45,90
c. 60,60,60
d.40,60,80
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