Respuesta :

aufarsn

Answer:

y=14

Step-by-step explanation:

  1. the triangle is equilateral triangle
  2. angle A = angle B
  3. so we immediately got the answer for x.. x=25
  4. so 180°-100°=80°
  5. 5y+10°=80°
  6. 5y=80°-10°
  7. 5y=70°
  8. y=70°/5
  9. y=14

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