- Expressions, Trigonometry, Angles & Polygons
**Alternate angles**Alternate angles in parallel lines are equal **Polygon**A 2D shape with straight sides **Quadrilateral**A four sided 2D shape **Expand**Multiply out the brackets **Factorise**Put an algebraic expression into brackets **Congruence**Two shapes are congruent if they are exactly the same shape and size **Index**Power **Similar shapes**Two shapes are similar if one is an enlargement of the other **Simplify**To gather all the like terms together into a single term **Corresponding angles**Corresponding angles in parallel lines are equal - Data handling 1 & 2, Fractions, Decimals & Percentages
**Random sample**A sample where everyone in the population has an equal chance of being chosen **Mean**An average found by totalling the numbers and dividing by how many there are **Median**An average found by listing the numbers in order and finding the middle number **Interquartile range**The difference between the upper quartile and the lower quartile **Range**The difference between the greatest and least values **Stratified sample**A sample where different groups (e.g. boys and girls) are represented in sample in the same proportion as the population **Mode**An average found by finding the item that occurs the most often **Biased sample**A sample where everyone in the population does not have an equal chance of being chosen **Cumulative frequencies**The total of all the frequencies in a set of data **Positive correlation**As one quantity increases so does the other **Negative correlation**As one quantity increases the other decreases - Formulae & Functions & Working in 2D (bearings, area and transformations)
**Formula**A mathematical relationship or rule expressed in symbols **Function**A relation between a set of inputs and a set of permissible outputs **Inverse function**A mathematical operation or function that exactly reverses another operation or function **Transformation**The act of moving or changing a shape **Reflection**A reflection is an image that you can see in a mirror line **Rotation**The action of rotating about an axis or centre **Enlargement**The action of enlarging a shape or solid **Translation**The action of moving a shape along and up or down **Tessellation**Repeating a shape to cover an area with no gaps and no overlapping **Area**The amount of surface that a shape has - Probability, Measures & Accuracy, and Compound Measures
**Relative frequency**Experimental probability **Theoretical probability**The likeliness of an event happening based on all the possible outcomes **Probability space diagram**A list of all possible probability events **Mutually exclusive events**Two or more events are said to be mutually exclusive if they cannot occur at the same time **Independent events**Two events are independent if the occurrence of one does not affect the occurrence of the other **Estimate**An approximate calculation **Upper bound**The upper limit of a calculation **Lower bound**The lower limit of a calculation **Error interval**The margin of error when rounding, usually expressed as an inequality - Equations & Inequalities, Ratio & Proportion, Factors, Powers & Roots and Circles
**Equation**A mathematical statement where the values of two mathematical expressions are equal (indicated by the sign =) **Inequality**The relation between two expressions that are greater or less then each other **Surd**An expression containing one or more irrational roots of numbers, such as 2√3 + 3√2 + 6 **Circumference**The distance round the outside of a circle **Radius**The distance from the centre to the edge of a circle **Diameter**The distance across a circle through the centre **Chord**A chord is a straight line drawn through a circle which divides the circle into two parts. The line can be drawn anywhere in the circle EXCEPT the center where it becomes the diameter **Sector**The sector of a circle is a portion of the circle enclosed by two radii and an arc **Segment**The segment of a circle is a part of the circle bounded by a chord and an arc **Tangent**A line that touches a circle - Year 10 Exams, Approximate solutions and inequalities, Constructions & Loci
**Iteration**The repetition of a mathematical process applied to obtain successively closer approximations to the solution of a problem **Inequality**The relation between two expressions that are greater or less then each other **Perpendicular bisector**A line which cuts a line segment into two equal parts at 90° **Angle bisector**A line which cuts an angle into two equal parts **Loci**The set of all points that satisfy given conditions **Factor**A number that divides exactly into a given number e.g. the factors of 12 are 1 & 12, 2 & 6, 3 & 4 **Multiple**A multiple is a number made by multiplying together two numbers **Prime factorisation**To express a number as the product of its prime factors

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