3 years ago

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

Mathematics

1 answer:

Sauron [17]3 years ago

6 0

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

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