Final answer:
A triangle cannot have more than one right angle because the sum of all angles in a triangle must be 180 degrees.
Step-by-step explanation:
A right angle in a triangle measures 90 degrees, and by definition, a triangle cannot have more than one right angle because the sum of all angles in a triangle must be 180 degrees. If a triangle had more than one right angle, the sum of the angles would exceed 180 degrees, which is not possible.
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