Question 12
If the sum of two angles is equal to an obtuse angle, then which of the following is not possible?
a) One obtuse angle and one acute angle
b) One right angle and one acute angle
c) Two acute angles
d) Two right angles
An obtuse angle is an angle whose measure is more than 90∘ but less than 180∘.
The sum of two right angles is equal to 180∘. So, it is not an obtuse angle.