What is the maximum possible number of obtuse angles in a triangle? Justify your answer. [3 MARKS]
Answer: 1 Mark
Reason: 2 Marks
In a triangle, only one obtuse angle can exist.
If we have more than one obtuse angle in a triangle, then the sum of two (obtuse) angles will exceed 180∘.
But sum 3 angles of a triangle is 180∘.
⇒ A triangle can not have more than one obtuse angle.