Math 9 Terms
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| Acute Angle | an angle measuring less than 90 degrees
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| Angle of Depression | the angle formed by the horizontal and the line of sight to something below the horizontal
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| Angle of Elevation | the angle formed by the horizontal and the line of sight to something above the horizontal
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| Area | the space within a region measured in square units
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| Average | the mean set of numbers, found by summing all numbers in the group and dividing by the numbers of members in the group
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| Base | the side or face of a polygon or solid from which an altitude rises
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| Base (of a power) | the number in a power used as a factor for multiplication. In the power 9^3, the base is 9
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| Binomial | a polynomial with exactly 2 terms
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| Capacity | the greatest volume a container can hold
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| Circumference | the measure of the distance around a circle (the perimeter of a circle)
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| Coefficient (numerical) | the variable part of a term, in 13x, the numerical coefficient is 13
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| Coefficient (variable) | the variable part of a term, in 13x, the variable coefficient is x.
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| Complementary Angles | two angles who's sums is exactly 90 degrees
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| Composite Number | a number with a minimum of three factors including 1 and itself
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| Constant | a number by itself
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| Corresponding Angles/Sides | angles and sides that have the same relative positions in two or more geometric figures
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| Cosine | a measure in a right triangle that is the ratio of the side adjacent to the hypotenuse for either of the acute angles in the triangle
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| Cube | a solid with six square faces
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| Degree Of Polynomial | the highest sum of the exponents of the variables in any one term of the polynomial
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| Diameter | the longest distance connecting two points on a circle and passing through the center
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| Enlargement | a dilatation where the resulting image is larger then the original figure
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| Equilateral Triangle | a triangle with all three equal sides
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| Exponent | a symbol written above and to the right of a mathematical expression to signify how many times it is to be multiplied by itself
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| FOIL | an acronym for first terms, outside terms, inside terms and last terms
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| Frequency | the number of times a particular number or event occurs
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| Hypotenuse | the side of a right triangle that is opposite to the right angle
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| Independent Events | two or more events that are not influenced by each other
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| Inequality | an arrangement of two expressions so that one side is greater then the other
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| Integers | the set of numbers...-3,-3,-1,0,+1,+2,+3,...
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| Irrational Number | numbers in decimal form that are non-terminating and non repeating
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| Isosceles Triangle | a triangle with two equal sides
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| Line of Best Fit | a line that passes as close as possible to the points plotted on a graph
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| Monomial | a polynomial with only one term
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| Natural Numbers | the set of numbers 1, 2, 3, 4, 5,...
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| Net | a pattern that, when folded, makes there-dimensional object
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| Obtuse Angle | an angle measuring more than 90 degrees and less then 180 degrees
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| Perimeter | the measure of the distance around a closed figure
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| Pi | the ratio of the circumference of a circle to its diameter, 3.14.....
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| Polygon | a closed two-dimensional figure of three or more line segments
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| Polynomial | a mathematical expression with one or more terms, integral exponents, and coefficients that are real numbers
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| Population | the entire set of objects or people from which data can be taken
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| Power | the number of times as indicated by an exponent a number is multiplied by itself
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| Prime Number | a whole number with only two factors, itself and 1
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| Prism | a solid formed by two congruent and parallel sides and other faces that are parallelograms
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| Probability | a measure of how likely it is that some event will occur
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| Proportion | two equal ratios
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| Pythagorean Theorem | the square of a hypotenuse in a right angle triangle
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| Quadrant | any of the four regions of the coordinate plane formed by the two axes
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| Quadrilateral | any polygon with four sides
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| Radius | the distance from the center of a circle to the outside
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| Random Number | any number selected by chance
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| Random Sample | a sample or survey in which all members of the population have an equal chance of being selected
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| Ratio | a comparison of 2 or more quantities having similar units
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| Rational Number | a number that can be expressed as the quotient of 2 integers where the denominator is not 0
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| Real Numbers | the set of all rational and irrational numbers
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| Reduction | a dilation where the resulting image is smaller than the original figure
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| Reflection | a flip transformation in which all points of the figure and the corresponding points of its image are an equal distance from the line across which it is reflected
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| Relative Frequency | the number of times a particular outcome occurs related the number of times the experiment is conducted
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| Rotation | a transformation in which a figure is turned relative to a fixed point
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| Sample | a representative portion of a given population
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| Sample Size | the number of items selected as a sample from the entire population
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| Scatter Plot | a collection of points on a graph that represents the data
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| Scientific Notation | a number expressed as the product n and a power of 10
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| Similar Figures | figures with the same shape, but not necessarily the same size or orientation
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| Sine | opposite over hypotenuse
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| Supplementary Angles | = 180 degrees
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| Tangent | opposite over adjacent
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| Theoretical Probability | an outcome determined mathematically without conducting an experiment
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| Transformation | any mapping of a figure that results in a change in position, shape, size or appearance of the figure
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| Translation | a transformation that moves a point or a figure to another position in the same plane
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| Variable | a letter or symbol that represents a changing quantity
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| Volume | the amount of space occupied by an object measured in cubic units
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| Whole Numbers | the set of numbers 0, 1, 2, 3......
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Created by:
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