SOLUTION: how can you write an indirect proof that two obtuse angles cannot form a linear pair?

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Question 567032: how can you write an indirect proof that two obtuse angles cannot form a linear pair?
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
Assume that they do form a linear pair. Since both angles' measures are greater than 90 deg, then their sum must be greater than 180 deg. However, angles form a linear pair if and only if their sum is 180 deg, so contradiction.