Respuesta :

sqdancefan

Answer:

  • r = -7
  • Y = 52°

Step-by-step explanation:

The sum of the measures of the angles in a triangle is 180°.

  X + Y + Z = 180°

  84° +(r +59)° +(r +51)° = 180°

  2r +194 = 180 . . . . . . . . . divide by ° and simplify

  2r = -14 . . . . . . . . . .  subtract 194

  r = -7

Then the measure of Y is ...

  Y = (r +59)° = (-7 +59)°

  Y = 52°

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Additional comment

Z = 44°