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 Scalene Triangle A triangle with three unequal sides. Scientific Notation Displaying a number in this formula: N * 10^x. Where N=a number greater than 1 but less than 10. X=an exponent of 10. Example: 727900 in scientific notation is: 7.279 * 10^5 Segment a piece of a line with two endpoints Set A set is a collection of related things. Example: Days of the week. Solid Geometry area of geometry dealing with 3-d objects and figures Space the 3-d continuous expanse and of the matter contained within Sphere A round body whose surface is at all points the same distance from the center. Example: A baseball Square a rectangle with all four sides equal Square Root the number that when multiplied by itself will produce a given number (the square) Straight Angle An Angle of 180 degrees. Subset A set that forms one part of a larger set. Example: A subset of a baseball team is the pitching roster. Subtraction the process of finding the difference between two numbers Sum the result of adding numbers Example: 6+7=13 13 is the sum Superset A set that consists of a collection of smaller, subsets. Example: The baseball team is the superset of the pitching roster. Supplementary Angle Either of two angles that when added together produce an angle of 180 degrees.  