Question

Math question.......

Answer 1

Answer:

x=54

Step-by-step explanation:

easy

180 is a triangle

so

exterior+interior=180

so 180-123

57

now add all up to 180

180=57+x+69

x=54

Answer 2

9514 1404 393

Answer:

  54

Step-by-step explanation:

The sum of the interior angles marked is the same as the marked exterior angle. Then the unknown is the difference of the known angles:

  x° = 123° -69°

  x° = 54°