Respuesta :

9514 1404 393

Answer:

  C)  100 25 55 degrees

Step-by-step explanation:

The sum of the angle measures must be 180°.

  A: 30 +40 +90 = 160

  B: 120 +52 +98 = 270

  C: 100 +25 +55 = 180 . . . . these form a triangle

  D: 80 +80 +80 = 240

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