Hey!
Acute angles are angles that measure less than 90°. Obtuse angles are angles that measure more than 90° but less than 180°. Right angles are angles that measure exactly 90°.
132° is greater than 90°, but less than 180°. That means it's an obtuse angle.
36° is less than 90°. That means it's an acute angle.
12° is also less than 90°. That means it's also an acute angle.
Since one of the angles is obtuse, it is an obtuse triangle.
Good luck and hope this helps! :)