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# CKS Math 9

### Math 9 Terms

Question | Answer |
---|---|

Acute Angle | an angle measuring less than 90 degrees |

Angle of Depression | the angle formed by the horizontal and the line of sight to something below the horizontal |

Angle of Elevation | the angle formed by the horizontal and the line of sight to something above the horizontal |

Area | the space within a region measured in square units |

Average | the mean set of numbers, found by summing all numbers in the group and dividing by the numbers of members in the group |

Base | the side or face of a polygon or solid from which an altitude rises |

Base (of a power) | the number in a power used as a factor for multiplication. In the power 9^3, the base is 9 |

Binomial | a polynomial with exactly 2 terms |

Capacity | the greatest volume a container can hold |

Circumference | the measure of the distance around a circle (the perimeter of a circle) |

Coefficient (numerical) | the variable part of a term, in 13x, the numerical coefficient is 13 |

Coefficient (variable) | the variable part of a term, in 13x, the variable coefficient is x. |

Complementary Angles | two angles who's sums is exactly 90 degrees |

Composite Number | a number with a minimum of three factors including 1 and itself |

Constant | a number by itself |

Corresponding Angles/Sides | angles and sides that have the same relative positions in two or more geometric figures |

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 |

Cube | a solid with six square faces |

Degree Of Polynomial | the highest sum of the exponents of the variables in any one term of the polynomial |

Diameter | the longest distance connecting two points on a circle and passing through the center |

Enlargement | a dilatation where the resulting image is larger then the original figure |

Equilateral Triangle | a triangle with all three equal sides |

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 |

FOIL | an acronym for first terms, outside terms, inside terms and last terms |

Frequency | the number of times a particular number or event occurs |

Hypotenuse | the side of a right triangle that is opposite to the right angle |

Independent Events | two or more events that are not influenced by each other |

Inequality | an arrangement of two expressions so that one side is greater then the other |

Integers | the set of numbers...-3,-3,-1,0,+1,+2,+3,... |

Irrational Number | numbers in decimal form that are non-terminating and non repeating |

Isosceles Triangle | a triangle with two equal sides |

Line of Best Fit | a line that passes as close as possible to the points plotted on a graph |

Monomial | a polynomial with only one term |

Natural Numbers | the set of numbers 1, 2, 3, 4, 5,... |

Net | a pattern that, when folded, makes there-dimensional object |

Obtuse Angle | an angle measuring more than 90 degrees and less then 180 degrees |

Perimeter | the measure of the distance around a closed figure |

Pi | the ratio of the circumference of a circle to its diameter, 3.14..... |

Polygon | a closed two-dimensional figure of three or more line segments |

Polynomial | a mathematical expression with one or more terms, integral exponents, and coefficients that are real numbers |

Population | the entire set of objects or people from which data can be taken |

Power | the number of times as indicated by an exponent a number is multiplied by itself |

Prime Number | a whole number with only two factors, itself and 1 |

Prism | a solid formed by two congruent and parallel sides and other faces that are parallelograms |

Probability | a measure of how likely it is that some event will occur |

Proportion | two equal ratios |

Pythagorean Theorem | the square of a hypotenuse in a right angle triangle |

Quadrant | any of the four regions of the coordinate plane formed by the two axes |

Quadrilateral | any polygon with four sides |

Radius | the distance from the center of a circle to the outside |

Random Number | any number selected by chance |

Random Sample | a sample or survey in which all members of the population have an equal chance of being selected |

Ratio | a comparison of 2 or more quantities having similar units |

Rational Number | a number that can be expressed as the quotient of 2 integers where the denominator is not 0 |

Real Numbers | the set of all rational and irrational numbers |

Reduction | a dilation where the resulting image is smaller than the original figure |

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 |

Relative Frequency | the number of times a particular outcome occurs related the number of times the experiment is conducted |

Rotation | a transformation in which a figure is turned relative to a fixed point |

Sample | a representative portion of a given population |

Sample Size | the number of items selected as a sample from the entire population |

Scatter Plot | a collection of points on a graph that represents the data |

Scientific Notation | a number expressed as the product n and a power of 10 |

Similar Figures | figures with the same shape, but not necessarily the same size or orientation |

Sine | opposite over hypotenuse |

Supplementary Angles | = 180 degrees |

Tangent | opposite over adjacent |

Theoretical Probability | an outcome determined mathematically without conducting an experiment |

Transformation | any mapping of a figure that results in a change in position, shape, size or appearance of the figure |

Translation | a transformation that moves a point or a figure to another position in the same plane |

Variable | a letter or symbol that represents a changing quantity |

Volume | the amount of space occupied by an object measured in cubic units |

Whole Numbers | the set of numbers 0, 1, 2, 3...... |

Created by:
mwalsh16