Respuesta :

Answer:

  • The answer is y = 67°.

Step-by-step explanation:

  • 56 + y + (180 - 123) = 180
  • => 56 + y + 57 = 180
  • => y = 180 - 113
  • => y = 67°

Conclusion:

Therefore, the answer is y = 67°.

Hoped this helped.

[tex]-BrainiacUser1357-[/tex]

Solution:

Note that:

  • Interior angles of a triangle sum up to 180°

This means that...

56 + y + (180 - 123) = 180

Let's simplify the equation to find y.

=> 56 + y + (180 - 123) = 180

Simplify the LHS.

=> 56 + y + (57) = 180

=> 113 + y = 180

Subtract 113 both sides.

=> 113 - 113 + y = 180 - 113

=> y = 180 - 113 = 67°

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