**(i) No, **

Two right angles would up to 180^{o}.,So the third angle becomes zero. This is not possible, so a triangle cannot have two right angles. [Since sum of angles in a triangle is 180^{o} ]

**(ii) No, **

A triangle can’t have 2 obtuse angles. Obtuse angle means more than 90^{o} So that the sum of the two sides will exceed 180^{o} which is not possible. As the sum of all three angles of a triangle is 180^{o} .

**(iii) Yes **

A triangle can have 2 acute angle. Acute angle means less the 90^{o} angle

**(iv) No, **

Having angles-more than 60^{o} make that sum more than 18^{o }Which is not possible [ The sum of all the internal angles of a triangle is 180^{o} ]

**(v) No, **

Having all angles less than 60^{o} will make that sum less than 180^{o} which is not possible. [The sum of all the internal angles of a triangle is 180^{o}]

**(vi) Yes **

A triangle can have three angles are equal to 60^{o} . Then the sum of three angles equal to the 180^{o }Which is possible such triangles are called as equilateral triangle. [ The sum of all the internal angles of a triangle is 180^{o} ]