Question

What is the value of x?



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Answer 1

x = 111º

Explanation:

In a heptagon, (A polygon with 7 sides, and therefore 7 angles), the sum of the interior angles is always 900º (just like the sum of all interior angle in a quadrilateral is always 360º). So you can add up all of the interior angles, and subtract them from 900º.

900º - (158º + 120º + 126º + 125º + 121º + 139º) = 111º