A right triangle can have 2 equal angles if they are each 45° (any other right triangle will have no equal angles)
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An obtuse triangle can have no right angles, and has two equal angles.
none - it's an isoscelese triangle it doesn't have right angles. It has two equal angles (both acute) and one other andgle (also acute)
The 3 interior angles of a right angle triangle add up to 180 degrees
An equilateral triangle has 3 equal sides and 3 equal angles of 60 degrees.
If it is an equilateral triangle then it will have 3 equal angles If it is an isosceles triangle then it will have 2 equal angles plus another different size angle