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South Habersham Middle School 7th Grade Math Powertime Vocabulary Unit 4

Adjacent Angle Angles in the same plane that have a common vertex and a common side, but no common interior points.
Circumference The distance around a circle.
Complementary Angle Two angles whose sum is 90 degrees.
Congruent Having the same size, shape and measure.
Cross-section A plane figure obtained by slicing a solid with a plane.
Irregular Polygon A polygon with sides not equal and/or angles not equal.
Pi The relationship of the circle’s circumference to its diameter, when used in calculations. It is typically approximated as 3.14; the relationship between the circumference (C) and diameter (d), c/d or 3.14
Regular Polygon A polygon with all sides equal (equilateral) and all angles equal (equiangular).
Supplementary Angle Two angles whose sum is 180 degrees.
Vertical Angles Two nonadjacent angles formed by intersecting lines or segments. Also called opposite angles.
Probability A measure of the likelihood of an event. It is the ratio of the number of ways a certain event can occur to the number of possible outcomes.
Probability Model It provides a probability for each possible non-overlapping outcome for a change process so that the total probability over all such outcomes is unity. This can be either theoretical or experimental.
Relative Frequency of Outcomes Experimental Probability
Sample space All possible outcomes of a given experiment.
Simple Event Any event which consists of a single outcome in the sample space. It can be represented by a single branch of a tree diagram.
Created by: hbogue