O

=**O**= Octagon- A polygon with 8 sides Octahedron- A polygon with 8 faces Odd number- A whole number that can not be divided by 2 Operation symbol- A symbol used to show a mathematical operation such as:-, =,+, and Opposite of a number- A number the same distance away from the number line,example:3,-3 Order of Operations- Rules that tell what order to preform operations in algebra Origin-the point 0,0, on a coordinate grid