Pls help with explanations

Answer:
a. Obtuse
b. Acute
c. Acute
Step-by-step explanation:
Angles and their names
In part a, we have an angle greater than 90°, so it's an obtuse angle
In part b, we have an angle less than 90°, so it's an acute angle
In part c, we have an angle less than 90°, so it's an acute angle
-Chetan K