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zlopas [31]
3 years ago
10

Find the value of x x=

Mathematics
1 answer:
Lena [83]3 years ago
7 0

9514 1404 393

Answer:

  x = 65

Step-by-step explanation:

The sum of exterior angles of a polygon is 360°.

  40 + x + 77 + 2x + 45 = 360

  3x + 165 = 360 . . . . simplify

  x + 55 = 120 . . . . . . divide by 3

  x = 65 . . . . . . . . . . . subtract 55

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