Answer:
is an obtuse angle
Step-by-step explanation:
An angle is a figure formed by two sides of a triangle sharing the common vertex.
Basically, in a triangle , an angle refers to a amount of turn by the sides of the triangle around a common vertex.
An acute angle is angle whose measure is less than
and an obtuse angle is a angle whose measure lies between
and
.
A right angle is equal to 
A straight angle is equal to 
A complete angle is equal to 
Here, from the figure we observe that 
So, angles
are acute angles.

So,
is an obtuse angle.