An Octogon has the same number of sides as an octopus has arms.
None, since there is no such word. But an octagon has 8 corners.
The octagon has 8 angles in every grade.
Octagan
An octagon is made up from six triangles each containing 180 degrees.
45 degrees/angle for a regular octagon.350/8=45.
An octagan
It is: 135 degrees
You will have to define who "they" is.
20 diagonals in Octagan. For n-sided polygon, no of diagonals = (n choose 2 ) - n = 8C2 - 8 = 28 - 8 = 20
a crescent has 19 sides
If it is a regular octagon it's 1080 degrees. You can use this formula: S = (n-2) x 180