Find the measure of angle x in the figure.
Total sum of angles in heptagon = 1080
⇒132 + 123 + 131 + 125 + x + 124 + 129 = 1080
⇒764 + x = 1080
⇒x = 316º
The sum of internal angles in the heptagon is 900º
x = 900 - (124+129+132+123+131+125)
x = 136º
+526 
