1260 degrees
The sum of the interior angles of a n-gon is (n-2)*180 degrees. n = 7, so sum of interior angles = (7-2)*180 = 5*180 = 900 degrees.
The sum of all the interior angles of any octagon is 1080 degrees, so that means that each angle is 135 degrees. You can find the measure of all the interior angles of any ploygon by using this equation: (number of sides in the polygon subtracted by 2) all multiplied by 180.
hexagon
The sum of the exterior angles of a polygon, however many sides it has, is 360 degrees. If the 20 sided polygon is regular, its angles are equal, and each is then 360/20 = 18 degrees.
The exterior angles add up to 360 degrees.
1260 degrees
The sum of the interior angles of a n-gon is (n-2)*180 degrees. n = 7, so sum of interior angles = (7-2)*180 = 5*180 = 900 degrees.
1800 degrees in total
The sum of all the interior angles of any octagon is 1080 degrees, so that means that each angle is 135 degrees. You can find the measure of all the interior angles of any ploygon by using this equation: (number of sides in the polygon subtracted by 2) all multiplied by 180.
n is number of sides. Sum of interior angles is 180n - 360, so 180n = 2880 + 360, ie 3240 and n = 3240/180 ie 18.
pentagon
hexagon
The sum of the exterior angles of a polygon, however many sides it has, is 360 degrees. If the 20 sided polygon is regular, its angles are equal, and each is then 360/20 = 18 degrees.
find the sum of the measures of the interior angles of 13-gon.
All polygons have the same ratio of sides to angles - 1:1
(number of sides - 2)*180 = total sum of interior angles