IGCSE›Cambridge IGCSE Maths›Mind mapsTransformationsCambridge IGCSE Maths: Mind mapStudy pack PDFAlso for this subtopic:Revision notesFlashcardsSubtopic testCover factsThe fourReflection flips over a mirror lineRotation turns about a fixed centreEnlargement resizes by a scale factorTranslation slides using a column vectorReflectionState the equation of the mirror linee.g. x=2x = 2x=2, y=−1y = -1y=−1, y=xy = xy=xImage is the same distance from the line, opposite sideDiagonal mirror lines appear at ExtendedRotationState the centre as a coordinateState the angle, e.g. 90°, 180°, 270°State the direction, clockwise or anticlockwise180° needs no directionTransformationsfour types(3−2)\binom{3}{-2}(−23)x=2x=2x=2EnlargementState the scale factor and the centreGreater than 1: image is biggerFraction between 0 and 1: image is smallerNegative scale factor (Extended): opposite side, invertedTranslationState the column vector(3−2)\binom{3}{-2}(−23) is 3 right, 2 downMove every vertex by the same vectorCombinations (Extended): apply in the order givenExam tipsName plus full details, or lose marksFractional enlargement is still an enlargementFirst three give congruent shapesEnlargement gives a similar shape