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A 90 degree angle and 2 acute angles will form a right angle triangle.
Any three angles that sum to 180 can form a triangle.
a triangle always forms two angles?
Any triangle with one angle in the range (90, 180) degrees and the other two angles adding up to its supplement will form an obtuse triangle.
No, because two right angles=180 degrees. A triangle has three sides and is 180 degrees, so two right angles would not form a triangle.