Question 435766
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Hi
two angles are supplementary. 
the larger angle has measure three times as great as the measure of the smaller angle
Let x and 3x represent the measure of the smaller and larger angle
Question states***
 x + 3x = 180°
   4x = 180°
    x = 45°, the smaller angle

CHECKING our Answer*** 135° the larger angle (3*45°)
  45° + 135° = 180°