Question

What kind of angle is shown in the image below

Answer 1

ACUTE ANGLE.
this is because the angle is less than 90 degree and greater than 0 degree

Answer 2

This Is An Acute Angle. 
You Know This Because:
Acute Angles Are Angles That Measure Less Than 90 Degrees. 
A Right Angle Is An Angle That Measures Exactly 90 Degrees
An Obtuse Measures More Than 90.