SOLUTION: if two angles are supplementary and congruent, the measure of each angle is 90 degrees true or false? why?

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Question 482345: if two angles are supplementary and congruent, the measure of each angle is 90 degrees true or false? why?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
True.
A = 90
A + B = 180
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B + B = 180
2B = 180
B = 90
A = B