Answer:
a) 172: obtuse angle
b) 97: obtuse angle
c) 41: acute angle
d) 196: reflex angle
Explanation:
An acute angle measure less than 90 degrees
An obtuse angle measures between 90 and 180 degrees
A reflex angle measures between 180 and 360 degrees.
So,
a) 172 is between 90 and 180.
It is an obtuse angle
b) 97 is between 90 and 180
It is an obtuse angle
c) 41 is less than 90
It is an acute angle
d) 196 is between 180 and 360
It is a reflex angle