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x Numerical value: The absolute value of a number . Acute angle: An angle less than 90°. Adjacent angles: Two angles are adjacent if they share a common vertex and a common side, but do not overlap. Altitude: In geometry, generally, a line segment (or its length) which measures the height of a figure. Area: A numerical measure expressing two dimensional extends in a plane. A geometric square of side 1 has area 1 or unit area; the area of any planar region can be thought of as the number of such unit squares it contains. Base: In geometry, a particular side or face of a geometric figure, such as a triangle, cone, etc.; in algebra the number to which an exponent applies. Complementary angles: Two angles whose sum is 90°. Coordinate plane: Of a system of Cartesian coordinates in space, any one of the three planes containing two axes Decimal: The ordinary system of notation for numbers using place values and the base ten. The digits of the decimal system are 0-9. Denominator: Of a fraction A/B the expression represented by B Distributive property: Cumulative distribution function Of a Random variable, usually the probability F that it will take on a value not greater than x Equilateral: In geometry, having equal sides. An equilateral triangle is necessarily equiangular, but an equilateral polygon of more than three sides need not be equiangular. Exponents: In an expression of the form ba a is called the exponent; b is the base and b with the is a power of b. Factorial: A factorial is! Graphing Inequalities: For an inequality in two variables, x and y, the set of points in the plane witch satisfies the inequality. Hypotenuse: The side opposite the right angle in a right triangle; it is the longest side. Improper fraction: A fraction with a higher number on top rather than the bottom. Inequalities: A symbol shown to tell whether or not a number is greater than or less that or equal to the number next to it. Integer: A whole number that has its opposite. Interest: The % of an item that is added when a billing plan is set up. Irrational Numbers: A number that is not your average whole number or decimal. Isosceles Triangle: A triangle with 2 sides that are exactly the same. Least Common Multiple: The lowest common number that a number can go into. Like Terms: Terms that are very similar. Linear Equation: An equation on a graph that makes lines. Mean: A number found by adding all of the numbers and then dividing by how many numbers there are. Median: The middle number. Mixed number: A fraction with a whole number to the left of it. Mode: When there is more than one of the same numbers in a table. Multiplying Exponents: When you multiply two or more exponents together. Numerator: The top number in a fraction. Obtuse Angle: An angle more than 90° Order Of Operations: The order that numbers are multiplied, divided, added, subtracted, using parentheses or using exponents. Origin: The original number in an equation. Parallelogram: 4 sided parallelogram with two pairs of parallel lines. Percent: % the “percent” or divided amount of a whole number. Perimeter: The distance around an object. PI: 3.14 () and it is a ratio of a circle’s circumference to its diameter. Powers: Multiplied by, also known as exponents. Prime Number: Any number that another number can not go into. Probability: The chance that will happen. (Its odds) Proportion: The amount something is given to make a whole number. Pythagorean Theorem: A² + B²= C². Quadrants: The sections of a graph as in the four quadrants. Rational number: A number that another number can go into. Real Number: A number that is a whole. Rectangle: A 4 sided figure with each side having one exactly the same opposite to it. Rhombus: A 4 sided figure. Right Angle: An angle equal to 90 degrees. Scalene Triangle: a triangle with every side being different in length. Scientific Notation: The use of exponents. Solving Equation: Solving a equation. Square: a 4 sided figure with all the same sides. Square roots: a number times itself 2 times. Supplementary angles: an angle more than 180 degrees. Trapezoid: A 4 sided figure with the two horizontal sides being the same. Variable: X or any other insertion to a equation. Whole Number: A number that is not broken down. X/Y Axis: A horizontal or vertical graph line. Zero Exponents: Exponent of zero.