Question 447429
<pre>
If a triangle had a right angle of 90° and also an obtuse
angle which would be more than 90°, that would mean that only
two of the three angles would have sum more than 180° and the 
third angle added to those would make it have even still more 
than 180°.  So the question boils down to this:

Can a triangle have the sum of its three interior angles to
be more than 180°, or must they add up to exactly 180° no
more and no less?

Since the three angles of any triangle must have sum 180° and
never more than 180°, the answer is "never".

Edwin</pre>