In this article, you’ll find a comprehensive list of math-related words that start with the letter “h.

**Histogram-**A graphical display of data using bars of different heights.**Hypotenuse-**The longest side of a right-angled triangle.**Hyperbola-**A type of smooth curve lying in a plane.**Hypothesis-**An assumption made for the sake of argument or investigation.**Histogram-**A bar chart representing the frequency distribution of data.**Hexagon-**A six-sided polygon.**Hectare-**A unit of area equal to 10,000 square meters.**Heptagon-**A seven-sided polygon.**Homogeneous-**Consisting of parts all of the same kind.**Heliocentric-**Measured from or considered in relation to the center of the sun.**Harmonic-**Relating to or characterized by musical harmony or a series of related frequencies.**Hermitian-**Referring to a type of complex matrix equal to its own conjugate transpose.**Hessian-**A square matrix of second-order partial derivatives of a scalar-valued function.**Hypotenuse-**The side opposite the right angle in a right triangle.**Heuristic-**Enabling a person to discover or learn something for themselves.**Hilbert Space-**An abstract vector space used in quantum mechanics and other areas of physics.**Hypoid-**A type of spiral bevel gear whose axes do not intersect.**Hold-**In finance, to maintain an investment.**Horizontal-**Parallel to the plane of the horizon.**Homomorphism-**A structure-preserving map between two algebraic structures.**Hypoglycemia-**Condition characterized by an abnormally low level of blood sugar.**Hypergeometric-**Relating to a type of probability distribution.**Homogeneous Coordinates-**A system of coordinates used in projective geometry.**Hyperplane-**A subspace of one dimension less than its ambient space.**Harmonic Mean-**Type of average, useful for rates and ratios.**Hyperbolic-**Relating to hyperbolas; exaggerated.**Hinge-**A mechanism that allows rotation or movement in a single axis.