Respuesta :

Answer:

Since m∠SRT = 20

Therefore, m∠STR = 20

now

m∠STR +m∠STU = 180 ------------(linear pair angles)

I.e.

20 +4x = 180

i.e. 4x = 180-20

i.e. 4x = 160

i.e. x = 160/4

i.e. x = 40

Thus the value of x is 40 degrees.

Yw

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