What is a blunt angle?

Answer 1

A blunt angle is an angle that measures greater than 90 degrees but less than 180 degrees. In geometric terms, it is an angle that is obtuse but not a straight angle. Visually, a blunt angle would appear wider than a right angle but not a full straight line.

Answer 2

I think you're asking the name of an angle like this \_ rather than an angle like this /\. If so, the first is obtuse (more than 90 degrees) and the second is acute (less than 90 degrees). Incidentally, an angle of exactly 90 degrees, like this _| is called a right angle.