SOLUTION: < A is a supplement of < B and is a right angle, then what is m < B in degrees?

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Question 904430: < A is a supplement of < B and is a right angle, then what is m < B in degrees?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
180°-A = B
180°-90° = B
90° = B