Slope
A quantity which gives the inclination of a curve or line with respect to another curve or line. For a Line in thePlane making an Angle 
with the x-Axis, the Slope 
is a constant given by
where
and 
are changes in the two coordinates over some distance. It is meaningless to talk aboutthe slope in 3-D unless the slope with respect to what is specified.- Hexacontagon
- Hexacronic Icositetrahedron
- Hexad
- Hexadecagon
- Hexadecimal
- Hexaflexagon
- Hexagon
- Hexagonal Number
- Hexagonal Pyramidal Number
- Hexagonal Scalenohedron
- Hexagonal Tiling
- Hexagon Polyiamond
- Hexagram
- Hexagrammum Mysticum Theorem
- Hexahedron
- Hexahemioctahedron
- Hexakaidecagon
- Hexakis Icosahedron
- Hexakis Octahedron
- Hex Game
- Hexlet
- HexLife
- Hex Number
- Hexomino
- Hex (Polyhex)