# Math Vocabulary - H

Word Definition Examples
Half-life The amount of time required for a quantity to fall to half its value as measured at the beginning of the time period.

The time taken for the radioactivity of a specified isotope to fall to half its original value.

This term is frequently used in problems with exponential decay.
Half-plane One half of a plane

On a plane that is divided by a line, each side of the line is a half-plane, Hemisphere One half of a sphere

On the globe, the northern hemisphere is the top half of the world. Histogram A bar graph that shows the frequency of data in intervals of equal size.

The height of each bar shows the number of items in each interval Hyperbola A set of points that are equidistant from a foci.

The graph looks a lot like two parabolas on their side. Hypotenuse In a right triangle, the side opposite the right angle - the longest side in a right triangle Hypothesis In a conditional statement (if _ then_), the statement that immediately follows the if. The assumption you start with

Comments, questions, or you just need some help? Send an e-mail to Mrs. Shearer Last Updated: 6/26/2014  