Respuesta :

Answer:

x = -3

Step-by-step explanation:

55 + 54 = 109

109 + 74 = 183

Triangles = 180 degrees

So, 74 - 3 = 71

And 55+54+71 = 180

Smriti098

Answer :

We know the Area of a triangle is always 180°

55°+ 54°+ x° +74° = 180°

or, x° = (-3)°

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