Question

Explain why a right triangle can't have an obtuse angle in it.​

Answer 1

A traingle cannot be right angled and obtuse angled at the same time. Since a right angled triangle has one right angle the other two angles are acute.

Answer 2

A right triangle is made of a 90-degree angle and two acute angles to make a 180-degree shape. If you have an obtuse angle, an angle that measures more than 90-degrees, you cannot have a right angle in the shape.

Explanation:

Example: A triangle with an obtuse angle of exactly 91 degrees cannot have a 90-degree angle inside of it or else it is 181-degrees, which is too many degrees for a triangle.