di4ne121
di4ne121 di4ne121
  • 24-10-2021
  • Mathematics
contestada

what is the value of Y

what is the value of Y class=

Respuesta :

felipegomes220
felipegomes220 felipegomes220
  • 24-10-2021

Answer:

y = 150º

Step-by-step explanation:

The sum of internal angles of a triangle must be 180º and the sum of y + (x-20) forms a straight line which is also 180º, so:

2x + x + (x - 20) = 180

4x - 20 = 180

4x = 200

x = 50

x - 20 = 50 - 20

x - 20 = 30

y = 180 - 30

y = 150º

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