Wednesday

March 4, 2015

March 4, 2015

Posted by **chica** on Thursday, November 18, 2010 at 10:12pm.

Given: Triangle RST is an obtuse triangle.

Prove: Triangle RST does not have a right angle.

Let angle S be an obtuse angle. Assume Triangle RST has a right angle. Let angle R be a right angle. Use direct reasoning to lead to a contradiction.

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