Octagon Has How Many Sides. <br> <br>the internal angle at each vertex of a regular octagon is 135° ( 6 sides… pretty easy! This is the question of the amazon gaming weekend quiz.
The do prefix just means to add 2 to 10 which gives you 12! A regular octagon is represented by the schläfli symbol {8}. All 8 sides are equal.
An octadecagon has 18 sides and 18 angles!
The other more popular shapes are hexagon which has 6 sides, a pentagon which has 5 sides, a square which has 4 sides and a triangle which has 3 sides. Deca is of course a prefix denoting the number ten. Vertices is a point where two or more straight lines meet and a pentagon has 5 vertices. The do prefix just means to add 2 to 10 which gives you 12!
