The 3 interior angles of any triangle add up to 180 degrees
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A right-angle triangle will have one right-angle (90 degrees).
As many as you like because any triangle that has a 90 degree angle is always a right angle triangle.
The 3 interior angles of a right angle triangle add up to 180 degrees
The total number of degrees in a triangle is 180. this will not change no matter what type of triangle it is. (obtuse, acute, right angle, etc)
The three angles inside any triangle always add up to 180 degrees.If one of them is 90 degrees, then the triangle is a right triangle.