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December 18, 2014

December 18, 2014

Posted by **Alfa** on Friday, December 17, 2010 at 3:17pm.

- geometry -
**drwls**, Friday, December 17, 2010 at 10:19pmObtuse angles are greater than 90 degrees.

The sum of all angles in a triangle must be 180 degrees. You can't have two of them > 90 and have a total of 180.

Another indirect proof: try drawing one.

- geometry -
**ashana**, Tuesday, December 21, 2010 at 6:04pmyes

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