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Missing Angle: Complementary Angles
Figure out the value of the missing angle using the fact that two angles are called complementary when their measures add to 90 degrees.
Choose the right answer
Note: Two angles are called complementary when their measures add to 90 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°
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