Angle <ABC is right.
Angle <EDF is acute.
Angle <GHI is straight.

Angles <LOM and <NOM are adjacent 

Angle <ACB is a right angle

Angle <ACD is a right angle

Angle <NOM is an acute angle

Angle <LOM is an acute angle

Angles <ACD and <ACB are linear 

Angle <LON is obtuse

Angle <ADC and <ACB are linear
Angle <EIF and <EIH are adjacent