Can a triangle have two right angels, and why or why not?

Question

1. yes, because it would be a right triangle
2. no, because a triangle must have an obtuse angle
3. no, because there needs to be a third angle
4. yes, because 90 + 90 = 180

Answer 1

The correct answer is 3. no, because there needs to be a third angle. A triangle is defined as a polygon with three angles that must add up to 180 degrees. In this case, if two angles are right angles (90 degrees each), the third angle would have to be 0 degrees, resulting in a degenerate triangle.