Answer:
A
Explanation:
m∠MPN + m∠NPO = m∠MPO
m∠MPN is an acute angle. Because it's 57°, less than 90°
m∠AOC is 81° , so it's an acute angle, like m∠MPN
To find m∠NPO , just subtract m∠MPN from m∠MPO
81° = 57° + m∠NPO
m∠NPO = 81° - 57°
m∠NPO = 24°
Option A
So, m∠NPO is an acute angle. Because it's 24°, less than 90°
more about angles: Right angle = exactly 90° , Straight angle = exactly 180°, Full angle = exactly 360°
Hope this helps ^-^