Question

Can a triangle have both a right and obtuse angle?  Justify your answer mathematically.

Answer 1

A triangle has 180 degrees as a whole. An obtuse angle is an angle that has more than 90 degrees while a right right angle has 90 degrees. So, if were to be added, it will give a result of more than 180 degrees. So, the only angle can be added to a triangle that has an obtuse angle is an acute angle, since an acute is an angle that has less than 90 degrees.