the angle of the triangle are in the ratio of 3:5:8+4 find the angle
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3:5:8+4 = 180°
3x + 5x + 12x = 180°
20x = 180°
x = 180/20 = 9
the angles are:
3x = 3x9 = 27°
5x = 5x9 = 45°
(8+4)x = 12x = 12x9= 108°
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