## Assessment Map

##### Key Words and Meanings - Year 10 Maths (Higher)
• 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 A multiple is a number made by multiplying together two numbers