Respuesta :

Beta27
180º = the sum of all angles in triangle
180º = 38 + 39 + PNO
180º = 77 + PNO
180º-77º= PNO
103º=PNO

PNM + PNO = 180 (straight line)
PNM + 103 = 180
PNM = 180-103
PNM = 77 = x

Answer:

the value of x is 77

Step-by-step explanation:

In triangle Δ PNO

∠OPN +∠PNO + ∠PON =180° (since, the sum of interior angles of triangle are 180)

38° +∠PNO + 39° = 180°

        77° + ∠PNO = 180°

                ∠PNO  = 180° - 77°

                ∠PNO = 103°

         

Since, MNO is straight line

then angle at N is ∠PNM + ∠PNO = 180°

In given figure ∠PNM is x°

∠PNM + ∠PNO = 180°

  x°     +    103°  =  180°

                  x°    =  180° -103°

                   x°    =  77°

Hence, the value of x is 77

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