Find the measure of the missing angle. Round to the nearest tenth.
A regular heptagon
+37158 Interior angles of an n -polygon sum to ( n-2)(180) for 7 angles 5(180 ) = 900 degrees
so each of the seven interior angles = 900 / 7 = 128.57 degrees
angle n in the diagram is supplementary to this interior angle and equals 180 - 128.57 = 51.43 degrees
