A right angle triangle can only have one right angle of 90 degrees
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90 degrees
acute, obtuse and right angles
A triangle can only have a maximum of 1 right angle. The total degrees of all the angles of a triangle adds up to exactly 180. Since a triangle must have exactly three angles, it is not possible for the triangle to have more than one angle that is 90 degrees.
The third angle must be 90 degrees so it's a right-angled triangle
The minimum number is zero(0). The maximum number is one (1).