SOLUTION: Is this true. Congruent supplementary angles each have a measure of 90 degrees

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Question 986436: Is this true. Congruent supplementary angles each have a measure of 90 degrees
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
If you have two angles x and y, and they are congruent, then x = y. If they are supplementary, then x+y = 180

Solving the system below 
x+y = 180
x = y

for x and y gives x = 90 and y = 90. So the statement is true.

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