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gavmur [86]
3 years ago
11

PLEASE HELP!! WILL MARK BRAINLIEST AND THANK YOU!! What is value of x.

Mathematics
1 answer:
Ulleksa [173]3 years ago
5 0

Answer:

x = 111

Step-by-step explanation:

The sum of the interior angles of a polygon is

sum = 180° (n - 2) ← n is the number of sides

Here n = 7, thus

sum = 180° × 5 = 900°

Sum the given interior angles and equate to 900

x + 139 + 121 + 125 + 126 + 158 + 120 = 900, that is

x + 789 = 900 ( subtract 789 from both sides )

x = 111

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