Question
What is the value of X?
the sum of the interior angles of a heptagon (7 sides) is 900°
take away from 900 the know angles and you will find x
900 - 139 - 121 - 125 - 126 - 158 - 120 =
111°
check
139 + 121 + 125 + 126 + 158 + 120 + 111 =
900°
The answer is good
