The sum of all the interior angle of the octagon is 1080 degrees
Sum of interior angle of a polygon
In geometry, a polygon is a plane figure that is described by a finite number of straight line segments connected to form a closed polygonal chain.
The sum of interior angle of an octagon is 1080 degrees. Since the octagon has a 8 sides, the measure of each angle is expressed as:
n = Total angle/number of sides
n = 1080/8
n = 135 degrees
Take the sum
Sum = a + b + c + d + e + f + g+ h
Sum = 135 +135 + 135 +135 + 135 +135 + 135 +135
Sum = 1080 degrees
Hence the sum of all the interior angle of the octagon is 1080 degrees
Learn more on interior angle of a polygon here: https://brainly.com/question/24966296
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