MATH GLOSSARY
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A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
| Title | Description | |
|---|---|---|
| Half-Life | When some entity experiences exponential decay (reduction or diminution) the times it takes to lose half of its size (or strength) is its Half-Life. |  |
| Harmonic | A small integral multiple (or divisor) of a waveform is a harmonic. | |
| Heading | Quite similar to bearing, Heading is a dynamic direction that implies motion. | |
| Height | Altitude. How tall something is, measured in some perpendicular fashion to the "bottom" is its height. | |
| Helix | A straight line wrapped around a circular cylinder at some angle not perpendicular to the base of the cylinder results in a Helix. | |
| Heptagon | A seven-sided polygon is a Heptagon; also called a septagon. | |
| Heron's Formula | A wonderful little recipe (algorithm) for finding the area of a triangle when sides are known and the altitude is not known, the formula is best expressed with a semiperimeter. | |
| Hexahedron | A six-faced polyhedron is termed a Hexahedron. | |
| High Quartile | The 75th percentile. Also upper quartile. | |
| High Quintile | The 80th percentile; upper quintile. | |
| Hole | A missing element (typically a point) from an otherwise continuous function is called a Hole. | |
| Homogeneous Equations | Homogeneous Equations have terms of like power or order. | |
| Horizontal | Horizontal comes from orientation like the horizon; parallel to the "flat" surface of the earth; perpendicular to vertical. | |
| Hyperbola | A conic section of specific mathematical relation to foci; its shape is the intersection of a double cone with a plane. The difference between distances from a locus on the Hyperbola to the two foci is a constant. | |
| Hyperbolic Geometry | Hyperbolic Geometry is non-Euclidean geometry; within it the Parallel Postulate does not hold. | |
| Hypotenuse | The longest side of a right triangle is the Hypotenuse; it is always opposite the 90-degree angle (or right vertex). | |
| Hypothesis | In a biconditional statement the hypothesis is followed by a conclusion. In the scientific method, the hypothesis is the conjecture to be proved or disproved. | |
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