SOLUTION: If two angles are supplementary and congruent, the measure of each angle is 90 degrees. True or false?

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Question 476524: If two angles are supplementary and congruent, the measure of each angle is 90 degrees. True or false?
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
True. Since they are supplementary, the angles should measure x and 180 - x.
Since they are congruent, x = 180 - x
==> 2x = 180 ==> x = 90.