Use my words that start with H webpage to find Math terms that begin with the letter H. You can also print or download our free printable PDF download Math Dictionary. I like to keep this in my binder.
Half-Line - a ray.
Half-Plane - the part of a plane that lies on one side of a given line.
Hankel Matrix - a matrix in which all the elements are the same along any diagonal that slopes from northeast to southwest.
Harmonic Analysis - the study of the representation of functions by means of linear operations on characteristic sets of functions.
Harmonic Division - a line segment is divided harmonically by two points when it is divided externally and internally in the same ratio.
Harmonic Mean - the harmonic mean of two numbers a and b is 2ab/(a + b).
Hectare - a unit of measurement in the metric system equal to 10,000 square meters (approximately 2.47 acres).
Height of the Triangular Prism - the distance between the two bases.
Helix - the path followed by a point moving on the surface of a right circular cylinder that moves along the cylinder at a constant ratio as it moves around the cylinder. The parametric equation for a helix is x=a cos t; y=a sin t; z=bt
Hemisphere - half of a sphere.
Heptagon - a seven sided polygon.
Heronian Triangle - a triangle with integer sides and integer area.
Hexagon - polygon having six equal sides and six equal angles.
Hexagonal Number - a number of the form n(2n-1).
Hexagonal Prism - a prism with a hexagonal base.
Hexahedron - a polyhedron having 6 faces. The cube is a regular hexahedron.
Hexomino - a six-square polyomino.
Histogram - a bar graph such that the area over each class interval is proportional to the relative frequency of data within this interval.
Homeomorphism - a one-to-one continuous transformation that preserves open and closed sets.
Horizontal Line - a line parallel to the earth’s surface or the bottom of a page.
Hundred - 100.
Hundreds column - third column of numbers to the left of the decimal point.
Hyperbola - a curve with equation x2/a2-y2/b2=1.
Hyperbolic Spiral - the curve whose equation in polar coordinates is r*theta=a.
Hyperboloid - a geometric solid whose equation is x2/a2+y2/b2-z2/c2=1 orx2/a2+y2/b2-z2/c2=-1.
Hypotenuse - the longest side of a right triangle.
I keep these definitions as a glossary in my binder.