Transformations (OCR GCSE Maths): Flashcards

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Transformations
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What are the four types of transformations?

Translation, Rotation, Reflection, Enlargement

What is a translation?

Movement in a straight line using a vector

How to describe a translation

Specify the vector that defines the movement

What is a reflection?

Object flipped across a specific line (mirror line)

What does reflection produce?

Mirror image (exact replica on other side of line)

Key property of points in reflection

Same distance from line of reflection as original

What to specify when describing a reflection

Equation of the line of reflection

What is a rotation?

Turning a shape around a specific point

Three details needed to describe a rotation

Centre of rotation, direction, and angle

Typical angles of rotation

90°90°, 180°180°, or 270°270°

Special property of 180°180° rotation

Direction (clockwise or anti-clockwise) does not matter

What is an enlargement?

Changes size of shape while preserving proportions

Effect of scale factor greater than 11

Shape gets larger

Effect of scale factor between 00 and 11

Shape gets smaller

Two details needed to describe an enlargement

Centre of enlargement and scale factor

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