Which of the following are true?
Only (iii)
All. (i), (ii) and (iii)
The sum of the three angles of a triangle should be 180∘. Hence it cannot have two right angles. If it has all angles less than 60∘ then they cannot add up to form 180∘. A triangle can have two or three acute angles. It cannot have two obtuse angles because then the sum of the three angles would be greater than 180∘.