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Online Math Dictionary: H
Easy to understand math definitions for K-Algebra mathematics
Just scroll down or click on the word you want and I'll scroll down for you!
 
hemisphere heptagon hexagon
hexahedron horizontal hyperbola
hypotenuse    
Hemisphere
A hemisphere is half of a sphere.  

On our planet, the top half is called the Northern Hemisphere and the bottom half is called the Southern Hemisphere.

hemisphere globe

red line
Heptagon
A heptagon is a seven sided polygon.   The heptagon in the picture on the right is a regular heptagon because all the sides and angles are the same (congruent).

For more info on heptagons, check out my properties of heptagons page.

regular heptagon
red line
Hexagon
A hexagon is a six sided polygon.   The hexagon in the picture on the right is a regular hexagon because all the  sides and angles are the same (congruent).

For more info on hexagons, check out my properties of hexagons page.

regular hexagon
Hexahedron
A hexahedron is a six sided three dimensional geometric figure (a polyhedron).   A regular hexahedron is a cube because all the faces are the same size (congruent).

hexahedron
red line
Horizontal
A horizontal line is a line that runs along the horizon.

horizontal line
Hyperbola
Here's the official algebra definition:  A hyperbola is the intersection of a vertical plane with two inverted circular cones.  It is the set of points whose distances from two fixed points (the foci)  have  a constant distance.

For more info, more pictures and an easier explanation of what a hyperbola really is, check out my Intro to Hyperbolas lesson.

hyperbola
red line
Hypotenuse
The hypotenuse of a right triangle is the side that is opposite the right (90 degree) angle.

hypotenuse of a right triangle
A B C D E F G H I no
J's		 K L M
N O P Q R S T U V W no
X's		 no
Y's		 no
Z's

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