Question

solve:Given in Fig. 3​

Answer 1

Answer:

angle NOM = angle AOC ( vertically opposite angle)

angle NMO =angle DMF ( vertically opposite angle )

now,

angle NOM + angle NMO = angle ENB ( exterior angle property )

so,

angle ENB = x+x = 2x

Answer 2

Answer:

90° cause it form a right angle