# Study the word list: Key Stage 3: Mathematics: par - ref

 parallel A trapezoid or trapezium is a type of quadrilateral with at least one pair of parallel sides. parallelogram A parallelogram is a four-sided shape with opposite sides equal and parallel. negative Negative numbers are number less than zero. numerator A fraction has a numerator and a denominator. percentage I worked out the percentage of people with purple jumpers. perimeter Add all the sides of a shape to get the perimeter. perpendicular Perpendicular is exactly upright, at right angles to the base. positive Positive numbers are numbers more than zero. quadrilateral A trapezoid or trapezium is a type of quadrilateral with at least one pair of parallel sides. questionnaire Please complete the questionnaire. radius The radius is a line from one side of a circle to the centre. ratio Ratio data has an absolute zero. recurring A recurring number is a number that goes on forever; for example, a third of ten is 3 point 33 recurring. reflect In the exam, you will be asked to reflect a shape across an axis. reflection In mathematics, a reflection is a type of transformation.

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parallel
parallelogram
negative
numerator
percentage
perimeter
perpendicular
positive
questionnaire
ratio
recurring
reflect
reflection

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