Answer:
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.
Step-by-step 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.
