The sum of seven angles of an octagon is 132 degrees each. Find the measure of the eighth angle.

the sum of the angles in an ngon (a polygon with n sides) is (n-2) * 180

so an octagon has 8 sides and has a sum total of (8-2) * 180=1080 degrees

if each of 7 angles is 132, then 1080=?+7*132

1080=?+924

156=?

the 8th angle is 156 degrees