Transformations

describing an enlargement (3 marks)

M1: naming “enlargement”

M2: naming center of enlargement

M3: naming SF

doing an enlargement

1. count squares for distance to center of enlargement

2. plot new vertices by multiplying scale factor (distance * sf)

describing a rotation (4 marks)

M1: naming “rotation”

M2: naming point of rotation

M3: naming degrees of turning

M4: naming clockwise/anticlockwise

doing a rotation

1. copy vertices on both sides of tracing paper

2. keep pencil on center point of rotation when turning

describing a translation (2 marks)

M1: naming “translation”

M2: naming the vector

doing a transformation

1. count how many times vertex must be moved

2. plot new points

vectors

Top: x // Bottom: y

(+) move up or right // (-) move down or left

describing a reflection (2 marks)

M1: naming “reflection”

M2: naming equation for line or reflection

doing a reflection

1. count squares perpendicularly to each vertex

2. plot each vertex equal distance to the opposite side

3. when going diagonally, draw lines of reflection, flip tracing paper to line up /w LoR

negative enlargement

not division! » that’d be a decimal

1. multiply co-ords of vertices by the sf

2. do the distance in the opposite direction

invariant

something that doesn’t change under a specific transformation