Missing Angle: Supplementary Angles

Missing Angle: Supplementary Angles

Figure out the value of the missing angle using the fact that two angles are called supplementary when their measures add to 180 degrees.
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Note: Two angles are called supplementary when their measures add to 180 degrees.
Example: Angle DBA and angle ABC are supplementary angles. If angle ABC is 40°, what is angle DBA?
B
C
A
D
150°
140°
130°